EP3389845B1 - Process for preparing polyurea microcapsules with improved deposition - Google Patents
Process for preparing polyurea microcapsules with improved deposition Download PDFInfo
- Publication number
- EP3389845B1 EP3389845B1 EP16808727.8A EP16808727A EP3389845B1 EP 3389845 B1 EP3389845 B1 EP 3389845B1 EP 16808727 A EP16808727 A EP 16808727A EP 3389845 B1 EP3389845 B1 EP 3389845B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- microcapsules
- capsules
- perfume
- copolymer
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003094 microcapsule Substances 0.000 title claims description 77
- 229920002396 Polyurea Polymers 0.000 title claims description 14
- 230000008021 deposition Effects 0.000 title description 45
- 238000004519 manufacturing process Methods 0.000 title description 2
- 239000000203 mixture Substances 0.000 claims description 79
- 239000002304 perfume Substances 0.000 claims description 56
- 239000004971 Cross linker Substances 0.000 claims description 53
- 239000004615 ingredient Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 claims description 45
- 239000005056 polyisocyanate Substances 0.000 claims description 44
- 229920001228 polyisocyanate Polymers 0.000 claims description 44
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 38
- 239000000047 product Substances 0.000 claims description 38
- 125000003277 amino group Chemical group 0.000 claims description 37
- 230000008569 process Effects 0.000 claims description 37
- 229920001577 copolymer Polymers 0.000 claims description 36
- 239000003921 oil Substances 0.000 claims description 36
- 239000003995 emulsifying agent Substances 0.000 claims description 35
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 33
- 229920000768 polyamine Polymers 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 22
- 230000007935 neutral effect Effects 0.000 claims description 21
- -1 allyl dimethyl ammonium chloride Chemical compound 0.000 claims description 15
- 229920006317 cationic polymer Polymers 0.000 claims description 15
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 15
- 229920000084 Gum arabic Polymers 0.000 claims description 14
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 claims description 14
- 235000010489 acacia gum Nutrition 0.000 claims description 14
- 229920000881 Modified starch Polymers 0.000 claims description 13
- 239000000205 acacia gum Substances 0.000 claims description 13
- 235000019426 modified starch Nutrition 0.000 claims description 13
- JKNCOURZONDCGV-UHFFFAOYSA-N 2-(dimethylamino)ethyl 2-methylprop-2-enoate Chemical compound CN(C)CCOC(=O)C(C)=C JKNCOURZONDCGV-UHFFFAOYSA-N 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 12
- 239000004368 Modified starch Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 12
- 239000002453 shampoo Substances 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 12
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 claims description 11
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 11
- 239000003205 fragrance Substances 0.000 claims description 11
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 11
- 229920000371 poly(diallyldimethylammonium chloride) polymer Polymers 0.000 claims description 11
- 229920002401 polyacrylamide Polymers 0.000 claims description 10
- 102000011632 Caseins Human genes 0.000 claims description 9
- 108010076119 Caseins Proteins 0.000 claims description 9
- 108010010803 Gelatin Proteins 0.000 claims description 9
- 108010073771 Soybean Proteins Proteins 0.000 claims description 9
- 239000011258 core-shell material Substances 0.000 claims description 9
- 239000008273 gelatin Substances 0.000 claims description 9
- 229920000159 gelatin Polymers 0.000 claims description 9
- 229940014259 gelatin Drugs 0.000 claims description 9
- 235000019322 gelatine Nutrition 0.000 claims description 9
- 235000011852 gelatine desserts Nutrition 0.000 claims description 9
- 239000007764 o/w emulsion Substances 0.000 claims description 9
- 229940080237 sodium caseinate Drugs 0.000 claims description 9
- 229940001941 soy protein Drugs 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 229920002873 Polyethylenimine Polymers 0.000 claims description 7
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 claims description 6
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 claims description 6
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 6
- 239000002671 adjuvant Substances 0.000 claims description 5
- 239000002386 air freshener Substances 0.000 claims description 5
- 239000003599 detergent Substances 0.000 claims description 5
- PKWIYNIDEDLDCJ-UHFFFAOYSA-N guanazole Chemical compound NC1=NNC(N)=N1 PKWIYNIDEDLDCJ-UHFFFAOYSA-N 0.000 claims description 5
- RXFCIXRFAJRBSG-UHFFFAOYSA-N 3,2,3-tetramine Chemical compound NCCCNCCNCCCN RXFCIXRFAJRBSG-UHFFFAOYSA-N 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 150000002357 guanidines Chemical class 0.000 claims description 4
- 229920000582 polyisocyanurate Polymers 0.000 claims description 4
- 239000013638 trimer Substances 0.000 claims description 4
- 238000004040 coloring Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 239000008266 hair spray Substances 0.000 claims description 3
- 239000011495 polyisocyanurate Substances 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 241000195940 Bryophyta Species 0.000 claims description 2
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 2
- 241001465754 Metazoa Species 0.000 claims description 2
- 230000001166 anti-perspirative effect Effects 0.000 claims description 2
- 239000003213 antiperspirant Substances 0.000 claims description 2
- 239000007844 bleaching agent Substances 0.000 claims description 2
- 239000007795 chemical reaction product Substances 0.000 claims description 2
- 239000006071 cream Substances 0.000 claims description 2
- 239000002781 deodorant agent Substances 0.000 claims description 2
- 239000002979 fabric softener Substances 0.000 claims description 2
- 239000000499 gel Substances 0.000 claims description 2
- 238000010409 ironing Methods 0.000 claims description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000006210 lotion Substances 0.000 claims description 2
- 235000011929 mousse Nutrition 0.000 claims description 2
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 claims description 2
- 239000000344 soap Substances 0.000 claims description 2
- 239000013042 solid detergent Substances 0.000 claims description 2
- 241000978776 Senegalia senegal Species 0.000 claims 2
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims 1
- 150000001412 amines Chemical class 0.000 claims 1
- 239000002775 capsule Substances 0.000 description 143
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 24
- 239000000796 flavoring agent Substances 0.000 description 18
- 235000019634 flavors Nutrition 0.000 description 18
- 239000000839 emulsion Substances 0.000 description 17
- 239000000126 substance Substances 0.000 description 14
- 244000215068 Acacia senegal Species 0.000 description 13
- 230000002776 aggregation Effects 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 12
- 229920001222 biopolymer Polymers 0.000 description 12
- 239000002904 solvent Substances 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 10
- 238000004220 aggregation Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- STIAPHVBRDNOAJ-UHFFFAOYSA-N carbamimidoylazanium;carbonate Chemical compound NC(N)=N.NC(N)=N.OC(O)=O STIAPHVBRDNOAJ-UHFFFAOYSA-N 0.000 description 8
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 7
- 125000001931 aliphatic group Chemical group 0.000 description 7
- 230000008901 benefit Effects 0.000 description 7
- FMRHJJZUHUTGKE-UHFFFAOYSA-N Ethylhexyl salicylate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1O FMRHJJZUHUTGKE-UHFFFAOYSA-N 0.000 description 5
- 238000012695 Interfacial polymerization Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000011002 quantification Methods 0.000 description 5
- 239000000700 radioactive tracer Substances 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- SESFRYSPDFLNCH-UHFFFAOYSA-N benzyl benzoate Chemical compound C=1C=CC=CC=1C(=O)OCC1=CC=CC=C1 SESFRYSPDFLNCH-UHFFFAOYSA-N 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011149 active material Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 238000000149 argon plasma sintering Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000010406 interfacial reaction Methods 0.000 description 3
- KVWWIYGFBYDJQC-UHFFFAOYSA-N methyl dihydrojasmonate Chemical compound CCCCCC1C(CC(=O)OC)CCC1=O KVWWIYGFBYDJQC-UHFFFAOYSA-N 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- HIQIXEFWDLTDED-UHFFFAOYSA-N 4-hydroxy-1-piperidin-4-ylpyrrolidin-2-one Chemical compound O=C1CC(O)CN1C1CCNCC1 HIQIXEFWDLTDED-UHFFFAOYSA-N 0.000 description 2
- 235000006491 Acacia senegal Nutrition 0.000 description 2
- YPZUZOLGGMJZJO-UHFFFAOYSA-N Ambronide Chemical compound C1CC2C(C)(C)CCCC2(C)C2C1(C)OCC2 YPZUZOLGGMJZJO-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- OMPIYDSYGYKWSG-UHFFFAOYSA-N Citronensaeure-alpha-aethylester Natural products CCOC(=O)CC(O)(C(O)=O)CC(O)=O OMPIYDSYGYKWSG-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- DOOTYTYQINUNNV-UHFFFAOYSA-N Triethyl citrate Chemical compound CCOC(=O)CC(O)(C(=O)OCC)CC(=O)OCC DOOTYTYQINUNNV-UHFFFAOYSA-N 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 150000001413 amino acids Chemical class 0.000 description 2
- 229960002903 benzyl benzoate Drugs 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- WSDISUOETYTPRL-UHFFFAOYSA-N dmdm hydantoin Chemical compound CC1(C)N(CO)C(=O)N(CO)C1=O WSDISUOETYTPRL-UHFFFAOYSA-N 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 239000000469 ethanolic extract Substances 0.000 description 2
- 229940057975 ethyl citrate Drugs 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- SDQFDHOLCGWZPU-UHFFFAOYSA-N lilial Chemical compound O=CC(C)CC1=CC=C(C(C)(C)C)C=C1 SDQFDHOLCGWZPU-UHFFFAOYSA-N 0.000 description 2
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 description 2
- UWKAYLJWKGQEPM-LBPRGKRZSA-N linalyl acetate Chemical compound CC(C)=CCC[C@](C)(C=C)OC(C)=O UWKAYLJWKGQEPM-LBPRGKRZSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- LYBWJVKFJAIODE-UHFFFAOYSA-N n,n,n',n'-tetrakis(3-aminopropyl)butane-1,4-diamine Chemical compound NCCCN(CCCN)CCCCN(CCCN)CCCN LYBWJVKFJAIODE-UHFFFAOYSA-N 0.000 description 2
- 239000001814 pectin Substances 0.000 description 2
- 235000010987 pectin Nutrition 0.000 description 2
- 229920001277 pectin Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229920002689 polyvinyl acetate Polymers 0.000 description 2
- 150000003138 primary alcohols Chemical class 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 235000018102 proteins Nutrition 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000011012 sanitization Methods 0.000 description 2
- 150000003333 secondary alcohols Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000001694 spray drying Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 150000003505 terpenes Chemical class 0.000 description 2
- 150000003509 tertiary alcohols Chemical class 0.000 description 2
- 125000005425 toluyl group Chemical group 0.000 description 2
- 235000013769 triethyl citrate Nutrition 0.000 description 2
- UZNHKBFIBYXPDV-UHFFFAOYSA-N trimethyl-[3-(2-methylprop-2-enoylamino)propyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)NCCC[N+](C)(C)C UZNHKBFIBYXPDV-UHFFFAOYSA-N 0.000 description 2
- MBYLVOKEDDQJDY-UHFFFAOYSA-N tris(2-aminoethyl)amine Chemical compound NCCN(CCN)CCN MBYLVOKEDDQJDY-UHFFFAOYSA-N 0.000 description 2
- 125000005023 xylyl group Chemical group 0.000 description 2
- NFLGAXVYCFJBMK-RKDXNWHRSA-N (+)-isomenthone Natural products CC(C)[C@H]1CC[C@@H](C)CC1=O NFLGAXVYCFJBMK-RKDXNWHRSA-N 0.000 description 1
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 1
- XEJGJTYRUWUFFD-FNORWQNLSA-N (e)-1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one Chemical compound C\C=C\C(=O)C1C(C)C=CCC1(C)C XEJGJTYRUWUFFD-FNORWQNLSA-N 0.000 description 1
- WEEGYLXZBRQIMU-UHFFFAOYSA-N 1,8-cineole Natural products C1CC2CCC1(C)OC2(C)C WEEGYLXZBRQIMU-UHFFFAOYSA-N 0.000 description 1
- OEVIJAZJVZDBQL-UHFFFAOYSA-N 1-(5,5-dimethylcyclohexen-1-yl)pent-4-en-1-one Chemical compound CC1(C)CCC=C(C(=O)CCC=C)C1 OEVIJAZJVZDBQL-UHFFFAOYSA-N 0.000 description 1
- HXKKHQJGJAFBHI-UHFFFAOYSA-N 1-aminopropan-2-ol Chemical compound CC(O)CN HXKKHQJGJAFBHI-UHFFFAOYSA-N 0.000 description 1
- VUIWFNRBSGUSIN-UHFFFAOYSA-N 1-methyl-4-(4-methylpent-3-enyl)cyclohex-3-ene-1-carbaldehyde Chemical compound CC(C)=CCCC1=CCC(C)(C=O)CC1 VUIWFNRBSGUSIN-UHFFFAOYSA-N 0.000 description 1
- KHLFMZDGADSQGR-UHFFFAOYSA-N 1-oxacyclohexadec-3-en-2-one Chemical compound O=C1OCCCCCCCCCCCCC=C1 KHLFMZDGADSQGR-UHFFFAOYSA-N 0.000 description 1
- OVSKIKFHRZPJSS-UHFFFAOYSA-N 2,4-D Chemical compound OC(=O)COC1=CC=C(Cl)C=C1Cl OVSKIKFHRZPJSS-UHFFFAOYSA-N 0.000 description 1
- MZZRKEIUNOYYDF-UHFFFAOYSA-N 2,4-dimethylcyclohex-3-ene-1-carbaldehyde Chemical compound CC1C=C(C)CCC1C=O MZZRKEIUNOYYDF-UHFFFAOYSA-N 0.000 description 1
- BEARMGATPGLSKG-UHFFFAOYSA-N 2,6-dimethyloct-7-en-2-yl acetate Chemical compound C=CC(C)CCCC(C)(C)OC(C)=O BEARMGATPGLSKG-UHFFFAOYSA-N 0.000 description 1
- PUAQLLVFLMYYJJ-UHFFFAOYSA-N 2-aminopropiophenone Chemical compound CC(N)C(=O)C1=CC=CC=C1 PUAQLLVFLMYYJJ-UHFFFAOYSA-N 0.000 description 1
- OYINQIKIQCNQOX-UHFFFAOYSA-M 2-hydroxybutyl(trimethyl)azanium;chloride Chemical compound [Cl-].CCC(O)C[N+](C)(C)C OYINQIKIQCNQOX-UHFFFAOYSA-M 0.000 description 1
- NFAVNWJJYQAGNB-UHFFFAOYSA-N 2-methylundecanal Chemical compound CCCCCCCCCC(C)C=O NFAVNWJJYQAGNB-UHFFFAOYSA-N 0.000 description 1
- JRJBVWJSTHECJK-PKNBQFBNSA-N 3-Methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one Chemical compound CC(=O)C(\C)=C\C1C(C)=CCCC1(C)C JRJBVWJSTHECJK-PKNBQFBNSA-N 0.000 description 1
- 229940099451 3-iodo-2-propynylbutylcarbamate Drugs 0.000 description 1
- WYVVKGNFXHOCQV-UHFFFAOYSA-N 3-iodoprop-2-yn-1-yl butylcarbamate Chemical compound CCCCNC(=O)OCC#CI WYVVKGNFXHOCQV-UHFFFAOYSA-N 0.000 description 1
- WWJLCYHYLZZXBE-UHFFFAOYSA-N 5-chloro-1,3-dihydroindol-2-one Chemical compound ClC1=CC=C2NC(=O)CC2=C1 WWJLCYHYLZZXBE-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241000723346 Cinnamomum camphora Species 0.000 description 1
- 241001440269 Cutina Species 0.000 description 1
- 244000303965 Cyamopsis psoralioides Species 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- FPVVYTCTZKCSOJ-UHFFFAOYSA-N Ethylene glycol distearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCOC(=O)CCCCCCCCCCCCCCCCC FPVVYTCTZKCSOJ-UHFFFAOYSA-N 0.000 description 1
- WEEGYLXZBRQIMU-WAAGHKOSSA-N Eucalyptol Chemical compound C1C[C@H]2CC[C@]1(C)OC2(C)C WEEGYLXZBRQIMU-WAAGHKOSSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- 206010019049 Hair texture abnormal Diseases 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 1
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 1
- KGEKLUUHTZCSIP-UHFFFAOYSA-N Isobornyl acetate Natural products C1CC2(C)C(OC(=O)C)CC1C2(C)C KGEKLUUHTZCSIP-UHFFFAOYSA-N 0.000 description 1
- 241000234269 Liliales Species 0.000 description 1
- 229920002774 Maltodextrin Polymers 0.000 description 1
- NFLGAXVYCFJBMK-UHFFFAOYSA-N Menthone Chemical compound CC(C)C1CCC(C)CC1=O NFLGAXVYCFJBMK-UHFFFAOYSA-N 0.000 description 1
- 241000282372 Panthera onca Species 0.000 description 1
- 241000220317 Rosa Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 229920001938 Vegetable gum Polymers 0.000 description 1
- 239000001940 [(1R,4S,6R)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] acetate Substances 0.000 description 1
- 150000001242 acetic acid derivatives Chemical class 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 229960000846 camphor Drugs 0.000 description 1
- 229930008380 camphor Natural products 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- MIZGSAALSYARKU-UHFFFAOYSA-N cashmeran Chemical compound CC1(C)C(C)C(C)(C)C2=C1C(=O)CCC2 MIZGSAALSYARKU-UHFFFAOYSA-N 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 230000031902 chemoattractant activity Effects 0.000 description 1
- 229960005233 cineole Drugs 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013270 controlled release Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000000032 diagnostic agent Substances 0.000 description 1
- 229940039227 diagnostic agent Drugs 0.000 description 1
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical class OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- SEUDSDUUJXTXSV-UHFFFAOYSA-N dimethyl(oxo)silane Chemical compound C[Si](C)=O SEUDSDUUJXTXSV-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 229940113120 dipropylene glycol Drugs 0.000 description 1
- SMVRDGHCVNAOIN-UHFFFAOYSA-L disodium;1-dodecoxydodecane;sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O.CCCCCCCCCCCCOCCCCCCCCCCCC SMVRDGHCVNAOIN-UHFFFAOYSA-L 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009881 electrostatic interaction Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000855 fungicidal effect Effects 0.000 description 1
- 239000000417 fungicide Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N glycine betaine Chemical compound C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 150000002391 heterocyclic compounds Chemical class 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 239000000416 hydrocolloid Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 1
- 239000002418 insect attractant Substances 0.000 description 1
- 239000000077 insect repellent Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 235000001510 limonene Nutrition 0.000 description 1
- 229940087305 limonene Drugs 0.000 description 1
- UWKAYLJWKGQEPM-UHFFFAOYSA-N linalool acetate Natural products CC(C)=CCCC(C)(C=C)OC(C)=O UWKAYLJWKGQEPM-UHFFFAOYSA-N 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229930007503 menthone Natural products 0.000 description 1
- OVXRPXGVKBHGQO-UYWIDEMCSA-N methyl (1r,4ar,4br,10ar)-1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylate Chemical compound C1CC(C(C)C)=CC2=CC[C@H]3[C@@](C(=O)OC)(C)CCC[C@]3(C)[C@H]21 OVXRPXGVKBHGQO-UYWIDEMCSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 238000000386 microscopy Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000016709 nutrition Nutrition 0.000 description 1
- 238000000399 optical microscopy Methods 0.000 description 1
- 230000020477 pH reduction Effects 0.000 description 1
- 238000010419 pet care Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 150000003141 primary amines Chemical group 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000021317 sensory perception Effects 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000006076 specific stabilizer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 235000020357 syrup Nutrition 0.000 description 1
- 239000006188 syrup Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- JREYOWJEWZVAOR-UHFFFAOYSA-N triazanium;[3-methylbut-3-enoxy(oxido)phosphoryl] phosphate Chemical compound [NH4+].[NH4+].[NH4+].CC(=C)CCOP([O-])(=O)OP([O-])([O-])=O JREYOWJEWZVAOR-UHFFFAOYSA-N 0.000 description 1
- 150000004043 trisaccharides Chemical class 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
- 229920001285 xanthan gum Polymers 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/16—Interfacial polymerisation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
- A61K8/11—Encapsulated compositions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q13/00—Formulations or additives for perfume preparations
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
- C11D17/0039—Coated compositions or coated components in the compositions, (micro)capsules
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/50—Perfumes
- C11D3/502—Protected perfumes
- C11D3/505—Protected perfumes encapsulated or adsorbed on a carrier, e.g. zeolite or clay
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/56—Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
- C08G18/735—Polyisocyanates or polyisothiocyanates acyclic containing one isocyanate or isothiocyanate group linked to a primary carbon atom and at least one isocyanate or isothiocyanate group linked to a tertiary carbon atom
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/7642—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
Definitions
- the invention relates to the field of delivery systems. More particularly the present invention relates to a process for producing perfume- or flavor-containing microcapsules with improved deposition of encapsulated actives on targeted surfaces such as fiber, hair and skin, which can be used in home or personal care products, as well as to microcapsules obtainable by such a process and consumer products comprising these microcapsules.
- WO2012107323 discloses for example polyurea microcapsules providing improved deposition of perfume on treated surface and which are formed by the reaction between a polyisocyanate with an amino acid and guanazole.
- WO2009153695 relates to a process using a specific stabilizer in the form of aqueous polymers in specific proportion to form polyurea microcapsules bearing permanent positive charges in a single step.
- US20060216509 also addresses that same technical problem by disclosing a process for the cationization of polyurea capsules by acidification or alkylation to bear permanent positive charges. Despite those disclosures, there is still a need to find new solutions to this problem and provide delivery systems which combine good retention efficiency of an encapsulated active ingredient and improved deposition of that active on a target surface.
- WO 2015/023961 A1 discloses a process for the preparation of capsules comprising the following steps: preparing an oil phase comprising a polyisocyanate and an active material; emulsifying said oil phase in a solution comprising a capsule formation aid; adding to said emulsion a cross-linking agent to form a capsule slurry.
- the active material is a fragrance.
- the capsule formation aid is a mixture of polyvinyl alcohol and a copolymer of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate.
- the cross-linking agent is a branched polylethylenimine with a molecular weight of 200 to 2 000 000 Da.
- the present invention provides a solution to the above-mentioned problem by modifying the surface property of the shell of the at least partly aggregated microcapsules capsule.
- the obtained microcapsules demonstrate an improved deposition on target surfaces.
- microcapsules developed in this invention is well designed to obtain partly aggregated capsules having a shell with particular surface properties.
- the use of at least partly aggregated microcapsules having particular surface properties according to the invention provides an improvement of the deposition of said microcapsules on target surfaces such as fiber, hair and skin without any inconvenience usually associated with aggregates.
- a first object of the invention consists of a process for the preparation of core-shell microcapsules comprising the following steps:
- a second object of the present application consists of polyurea microcapsules as defined in claim 11.
- a third object of the present invention is a perfuming composition
- a perfuming composition comprising
- Another object of the present invention is a perfuming consumer product comprising the polyurea microcapsules obtained by process described above.
- a last object of the invention is the use of microcapsules as defined above to prolong the release of a fragrance over time.
- the process of this invention combines the use of a specific emulsifier together with that of the use of a polymeric cross-linker to generate aggregated droplets stabilized by the emulsifier of the present invention.
- the addition at the end of the process of a polyamine triggers the interfacial polymerization leading to a core-shell capsules that are at least partly aggregated and with surface property favoring the deposition on the surface such as fiber, hair and skin.
- a significant improvement of deposition over the known partly aggregated capsules obtained by using a polymeric cross-linker, is observed only by the combination of both features; i.e. a specific emulsifier and the polymeric cross-linker.
- the present invention advantageously solves the above-mentioned problems by forming an emulsion using specifically as emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms, characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof and then by adding, before the addition of a polyamine
- a first object of the present invention is a process for the preparation of core-shell microcapsules comprising the following steps:
- the combination of specific emulsifier as defined above with the use of a cross-linker allows obtaining capsules which deposit particularly well on targeted surfaces.
- At least one polyisocyanate having at least two isocyanate groups is dissolved in an oil phase preferably comprising a perfume or flavor.
- perfume or flavor (or also “perfume or flavor oil”) it is meant a perfume or flavor that is liquid at about 20°C and which will be in the core of the core-shell capsules.
- said perfume or flavor oil in which the polyisocyanate is dissolved in step 1) can be a perfuming or flavoring ingredient alone or a mixture of ingredients, in the form of a perfuming or flavoring composition.
- perfuming or flavoring ingredient it is meant here a compound, which is used in a perfuming or flavoring preparation or composition for the primary purpose of imparting a hedonic effect or modulating the odor or taste.
- an ingredient to be considered as being a perfuming or flavoring one, must be able to at least impart or modify in a positive or pleasant way the odor or taste of a composition, and not just as having an odor or taste.
- Said ingredient can on top of their primary purpose provides secondary benefits, including but not limited to malodour counteraction, antimicrobial effect, microbial stability, food preservation, sanitization, insect repellence or taste-masking.
- perfuming or flavoring ingredients present in the perfume or flavor oil do not warrant a more detailed description here, which in any case would not be exhaustive, a skilled person in the art being able to select them on the basis of his general knowledge and according to the intended use or application and the desired organoleptic effect sought.
- these perfuming or flavoring ingredients belong to chemical classes as varied as alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulphurous heterocyclic compounds and essential oils, and said perfuming or flavoring ingredients can be of natural or synthetic origin. Many of these ingredients are listed in reference texts such as the book by S.
- the perfuming ingredient(s) to be encapsulated may be dissolved in a solvent of current use in the perfume industry.
- the core of the capsule might be pure perfuming ingredients or a mixture of perfuming ingredients in an adequate hydrophobic solvent.
- the solvent is preferably not an alcohol. Examples of such solvents are diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, available from Eastman), benzyl benzoate, ethyl citrate and isoparaffins.
- the perfume oil comprises less than 20% and more preferably less than 10% of solvent, all these percentages being defined by weight relative to the total weight of the perfume. Most preferably, the perfume is essentially free of solvent.
- the perfume contains less than 10% of its own weight of primary alcohols, less than 15% of its own weight of secondary alcohols and less than 20% of its own weight of tertiary alcohols.
- the perfume does not contain any primary alcohols and contains less than 15% of secondary and tertiary alcohols.
- Such limited amounts of alcohols have the advantage of reducing the amount of isocyanate functional groups reacting with the perfume.
- the concentration of perfume is comprised between 10% and 60% by weight, relative to the total weight of the microcapsule slurry.
- the oil phase comprises a perfume oil and the polyisocyanate.
- the oil phase consists essentially of the perfume oil and the polyisocyanate.
- the oil phase comprises a perfume together with other active ingredient(s) with the primary purpose of delivering another benefit than the perfume and to be co-released with the perfume.
- active include a cosmetic, skin caring, malodor counteracting, bactericide, fungicide, pharmaceutical or agrochemical ingredient, a sanitizing agent, a diagnostic agent and/or an insect repellent or attractant.
- the at least one polyisocyanate dissolved in the perfume or flavor to form the oil phase can be any type of polyisocyanate comprising at least two isocyanate groups. Preferably it contains at least three isocyanate groups.
- the polyamine added in step c) of the process will react with those functional groups by interfacial polymerization to form the core-shell structure of the capsules. Following these numbers of functional groups, an optimal reticulation or network of the capsules wall will be achieved, providing microcapsules exhibiting a prolonged slow release of fragrances, as well as an improved stability in the consumer product. Low volatility polyisocyanate molecules are preferred because of their low toxicity.
- the at least one polyisocyanate is an aliphatic polyisocyanate, an aromatic polyisocyanate or a mixture thereof.
- the at least one polyisocyanate is in the form of a mixture of aliphatic and aromatic polyisocyanates
- the at least one aliphatic polyisocyanate and the at least one aromatic polyisocyanate are preferably used in a respective molar ratio comprised between 80:20 and 10:90, more preferably between 75:25 and 20:80, even more preferably between 60:40 and 20:80 and most preferably between 60:40 and 30:70.
- Such molar ratio is defined as the relative ratio of the number of moles of isocyanate groups provided by the at least one aliphatic polyisocyanate and the number of moles of the isocyanate groups provided by the at least one aromatic polyisocyanate.
- aromatic polyisocyanate is meant here as encompassing any polyisocyanate comprising an aromatic moiety. Preferably, it comprises a phenyl, a toluyl, a xylyl, a naphthyl or a diphenyl moiety, more preferably a toluyl or a xylyl moiety.
- Preferred aromatic polyisocyanates are biurets and polyisocyanurates, more preferably comprising one of the above-cited specific aromatic moieties.
- the aromatic polyisocyanate is a polyisocyanurate of toluene diisocyanate (commercially available from Bayer under the tradename Desmodur® RC), a trimethylol propane-adduct of toluene diisocyanate (commercially available from Bayer under the tradename Desmodur® L75), a trimethylol propane-adduct of xylylene diisocyanate (commercially available from Mitsui Chemicals under the tradename Takenate® D-110N).
- the aromatic polyisocyanate is a trimethylol propane-adduct of xylylene diisocyanate.
- aliphatic polyisocyanate is defined as a polyisocyanate which does not comprise any aromatic moiety.
- Preferred aliphatic polyisocyanates are a trimer of hexamethylene diisocyanate, a trimer of isophorone diisocyanate, a trimethylol propane-adduct of hexamethylene diisocyanate (available from Mitsui Chemicals) or a biuret of hexamethylene diisocyanate (commercially available from Bayer under the tradename Desmodur® N100), among which a biuret of hexamethylene diisocyanate is even more preferred.
- Examples of preferred specific mixtures of at least one aliphatic polyisocyanate and of at least one aromatic polyisocyanate are mixtures of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of xylylene diisocyanate, mixtures of a biuret of hexamethylene diisocyanate with a polyisocyanurate of toluene diisocyanate and mixtures of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of toluene diisocyanate. Most preferably, it is a mixture of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of xylylene diisocyanate.
- the at least one polyisocyanate is used in an amount comprised between 1 and 40%, preferably between 2 and 20% by weight, relative to the total weight of oil phase.
- step b) of the process of the present invention the oil phase is dispersed into an aqueous solution comprising as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecules produced by living organisms; iii) a biomacromolecules produced by living organisms characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof. This particular selection of emulsified
- emulsion is meant to designate the fact that the oil phase obtained in step a) is dispersed in an aqueous solution.
- emulsion is therefore understood as emulsion or dispersion.
- the presence of an emulsifier in the aqueous solution allows the stabilization of the oil droplets therein.
- a colloidal stabilizer could be used as emulsifier.
- the emulsion may be prepared by high shear mixing and adjusted to the desired droplet size. Droplet size may be checked with light scattering measurements or microscopy. This procedure does not require a more detailed description as it is well known to a skilled person in the art.
- biomacromolecule produced by living organisms it is meant biopolymer.
- Biopolymers are characterized by molecular weight distributions ranging from 1,000 (1 thousand) to 1,000,000,000 (1 billion) Daltons. These macromolecules may be carbohydrates (sugar based) or proteins (amino-acid based) or a combination of both (gums) and can be linear or branched.
- the biomacromolecules or biopolymers are preferentially surface active materials and should be amphiphilic or anionic namely negatively charged in water at a pH greater than 9.
- modified polyvinyl alcohol it should be understood a polyvinyl alcohol with functional group(s) other than hydroxyl on its side chain.
- the specific emulsifier used has an impact on the property of the surface of the capsule shell.
- the use of the selected as emulsifiers has shown to provide capsules with significantly improved deposition substrates such as hair, skin or tissue.
- the emulsifier is a biomacromolecule produced by living organisms which is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof.
- Suitable gum Arabic includes in particular Acacia Senegal, Acacia Seyal and mixtures thereof.
- the biopolymer is gum Arabic or modified starch.
- the emulsifier is a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms which is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof.
- the emulsifier is a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide.
- the pH of the oil-in-water emulsion obtained in step b) is adjusted above 12 before the addition of the polymeric cross-linker bearing amino groups.
- the pH is adjusted by the addition of a base.
- the said base may be selected from the group consisting of NaOH and KOH.
- the pH of the oil-in-water emulsion obtained in step b) is not modified before the addition of polymeric cross-linker bearing amino groups and is below 12, preferably above 6.
- the pH of the oil-in-water emulsion obtained in step b) is adjusted between 12 and 6 before the addition of polymeric cross-linker bearing amino groups and.
- the pH is adjusted by the addition of a base as mentioned above.
- the pH can be adjusted as a function of the level of aggregation required. The higher the pH is, the higher the level of aggregation is.
- step c) of the process of the invention a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 is added to the emulsion, followed by a polyamine with a molecular weight below 250 g/mol.
- a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000g/mol, preferably higher than 50 000 acts as a cross-linking reagent.
- it forms aggregated or surface coated microcapsules through intermolecular forces such as electrostatic interaction, hydrogen bonding and interfacial reactions.
- the presence of this polymeric cross-linker in the process is essential as it allows providing microcapsules that are at least partly aggregated.
- the level of aggregation provided by the process of the invention is such that the at least partly aggregated microcapsules are still susceptible of being processed at an industrial scale.
- the polymeric cross-linker bearing amino groups at the origin of the generation of aggregated droplets is added before the polyamine that is going to react with the polyisocyanate by interfacial polymerization.
- the amino groups of the polymeric cross-linker react through interfacial reaction with the isocyanate functional groups of two different droplets to form covalent bonds between drops, which leads to at least partial aggregation.
- the polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight equal or higher than 2 000 g/mol.
- the polymeric cross-linker bearing amino groups has a molecular weight higher than 50 000 g/mol.
- the polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight higher than 200 000 g/mol.
- the polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight comprised between 200 000 g/mol and 800 000 g/mol.
- molecular weight it is meant, in case of the polymeric cross-linker, the average molecular weight.
- said polymeric cross-linker is a polymeric cross-linker bearing primary amino groups.
- primary amino groups it is meant the normal meaning in the art, i.e. primary amine functional groups wherein a nitrogen atom is substituted by two hydrogen atoms and one hydrocarbonyl group.
- said polymeric cross-linker bearing amino groups is selected from the group consisting of polyvinylamines such as those sold under the trade name Lupamine® (trademark from BASF and commercially available from BASF), polyethyleimines such as those sold under the trade name Lupasol® (trademark from BASF and commercially available from BASF), polyaminoethylacrylates and mixtures thereof.
- the polymeric cross-linker bearing amino groups is selected from the group consisting of a polyvinylamine and a polyethyleimine.
- the polymeric cross-linker bearing amino groups is responsible for the at least partial aggregation of the microcapsules.
- said polymeric cross-linker acts as a cross-linking reagent and forms aggregated or surface coated droplets through interfacial reactions.
- the polyamine allows forming the core-shell capsules by reacting with isocyanate functional groups through interfacial polymerization.
- the polymeric cross-linker bearing amino groups and the emulsifier are used in a weight ration based on dry matter comprised between 0.1 and 10, more preferably between 0.5 and 2.
- the polyamine may be used alone, or be admixed with glycerine.
- said polyamine is selected from the group consisting of 1,2-diaminopropane, 1,2-diaminoethane, diethylenetriamine, guanidine, water soluble guanidine salts, tris-(2-aminoethyl)amine, N,N,N',N'-tetrakis(3-aminopropyl)-1,4-butanediamine, N,N'-bis(3-aminopropyl)-ethylenediamine and 3,5-diamino-1,2,4-triazole.
- the polyamine with a molecular weight below 250 g/mol is selected from the group consisting of water-soluble guanidine salts, guanidine, tris-(2-aminoethyl)amine, N,N'-bis(3-aminopropyl)-ethylenediamine, 3,5-diamino-1,2,4-triazole and N,N,N',N'-tetrakis(3-aminopropyl)-1,4-butanediamine. Most preferably it is selected from guanidine, water-soluble guanidine salts, 3,5-diamino-1,2,4-triazole and N,N'-bis(3-aminopropyl)-ethylenediamine.
- water soluble guanidine salt it is meant a salt soluble in water and resulting from the reaction of guanidine with an acid.
- guanidine carbonate is guanidine carbonate.
- the amount of polyamine used is typically adjusted so that, for each mole of isocyanate group dissolved in the perfume or flavor in step a), there is added from 0.5 to 3 moles of amine groups in step c).
- temperature is typically comprised between 50 and 75°C.
- the specific composition of the polyurea wall is key in obtaining microcapsules that are at the fine balance between release and retention so as to achieve satisfactory release of fragrances, once the capsules are placed on textiles or hair, while showing the desired stability in the product base (e.g. counteracts efficiently the extraction of the perfume by the surfactants of the consumer product) and improved deposition thanks to the controlled aggregation and the specific emulsifier. Therefore the selection of the polyamine and of the polyisocyanate, among the ones mentioned above, enables the fine tuning of the properties and stability of the capsules.
- the use of the specific emulsifier and the addition of the polymeric cross-linker before the addition of the polyamine allow the improvement of the deposition onto different types of surfaces of the microcapsules.
- the use of emulsifier of the present invention allows stabilizing the droplets of the emulsion before the addition of a polymeric cross-linker with high molecular weight leads to the formation of covalent bonds between drops of the dispersion obtained in step b) which results in a partly aggregated microcapsule slurry.
- the degree of aggregation is controlled by selecting the polymeric cross-linker bearing amino groups and/or adjusting the pH of the oil-in-water emulsion obtained in step b) before the addition of the polymeric cross-linker bearing amino groups followed by a polyamine. Furthermore, the property of the surface of the shell of the microcapsules of the present invention is greatly influence by the emulsifier.
- the microcapsules can be isolated from the slurry.
- the microcapsules slurry can be dried in a generally known manner to form a polyurea microcapsules powder. Any drying method known to a skilled person in the art can be used including, but not limited to fluidized bed or spray-drying tower with co-current or counter current air streams with atomizing devices of different configuration, such as two-fluid nozzles, rotary nozzles or ultrasonic nozzles.
- the slurry may be spray-dried preferably in the presence of a polymeric carrier material such as polyvinyl acetate, polyvinyl alcohol, dextrines, maltodextrines, glucose syrups, natural or modified starch, vegetable gums, gum acacia, pectins, xanthanes, alginates, carragenans or cellulose derivatives to provide microcapsules in a powder form.
- a polymeric carrier material such as polyvinyl acetate, polyvinyl alcohol, dextrines, maltodextrines, glucose syrups, natural or modified starch, vegetable gums, gum acacia, pectins, xanthanes, alginates, carragenans or cellulose derivatives.
- a polymeric carrier material such as polyvinyl acetate, polyvinyl alcohol, dextrines, maltodextrines, glucose syrups, natural or modified starch, vegetable gums, gum acacia, pectins,
- microcapsules comprising:
- the present invention provides microcapsules comprising a core comprising a perfume; i.e. the microcapsules of the present invention are perfume microcapsules.
- average droplet size is a number averaged diameter measured with a microscope on an average over 10 to 20 isolated droplets. This method is well known in the art and does not warrant a more detailed description here. A person skilled in the art is able to measure the average droplet size of the emulsion based on his general knowledge. The average size of at least partly aggregated microcapsules is determined using light scattering which is also a well-known method in the art to characterize a size distribution. Detail of the both methods are given is the experimental part.
- the at least partly aggregated microcapsules of the invention can be advantageously used for the controlled release of the encapsulated perfume or flavor while improving the deposition of said microcapsules on a target surface.
- This is particularly advantageous in the perfumery industry in what is commonly referred to as "rinse off' applications which usually suffer from the problem of losing the encapsulated perfume during rinsing and therefore hardly provide any perfume long-lasting. It is therefore particularly appreciated to include these microcapsules as perfuming ingredients in a perfuming composition or in perfumed consumer products.
- Another object of the present invention is a perfuming composition
- a perfuming composition comprising:
- perfumery carrier it is meant a material which is practically neutral from a perfumery point of view i.e. that does not significantly alter the organoleptic properties of perfuming ingredients.
- Said carrier may be a liquid or a solid.
- liquid carrier one may cite, as non-limiting examples, an emulsifying system, i.e. a solvent and a surfactant system, or a solvent commonly used in perfumery.
- a solvent and a surfactant system i.e. a solvent and a surfactant system
- a solvent commonly used in perfumery A detailed description of the nature and type of solvents commonly used in perfumery cannot be exhaustive.
- solvents such as dipropyleneglycol, diethyl phthalate, isopropyl myristate, benzyl benzoate, 2-(2-ethoxyethoxy)-1-ethanol or ethyl citrate, which are the most commonly used.
- perfumery carriers can be also ethanol, water/ethanol mixtures, limonene or other terpenes, isoparaffins such as those known under the trademark Isopar® (origin: Exxon Chemical) or glycol ethers and glycol ether esters such as those known under the trademark Dowanol® (origin: Dow Chemical Company).
- isoparaffins such as those known under the trademark Isopar® (origin: Exxon Chemical) or glycol ethers and glycol ether esters such as those known under the trademark Dowanol® (origin: Dow Chemical Company).
- absorbing gums or polymers may comprise wall-forming and plasticizing materials, such as mono, di- or trisaccharides, natural or modified starches, hydrocolloids, cellulose derivatives, polyvinyl acetates, polyvinylalcohols, proteins or pectins, or yet the materials cited in reference texts such as H. Scherz, Hydrokolloide: Stabilisatoren, Dickungs- und Gelierstoff in Strukturn, Band 2 der Strukturtechnisch Herbert Strukturchemie, für exphen Herbert GmbH & Co., Hamburg, 1996 .
- perfume co-ingredient an ingredient equivalent to what has been defined above as perfume ingredient.
- Said ingredient can take the form of a liquid oil, but can also be present in the form of a delivery system such as a perfume precursor, microcapsules, emulsions, dispersions or powders.
- perfumery adjuvant an ingredient capable of imparting additional added benefit such as a color, a particular light resistance, chemical stability, etc.
- additional added benefit such as a color, a particular light resistance, chemical stability, etc.
- a detailed description of the nature and type of adjuvant commonly used in perfuming compositions cannot be exhaustive, but it has to be mentioned that said ingredients are well known to a person skilled in the art.
- An invention's composition consisting of the invention's perfume microcapsules and at least one perfumery carrier represents a particular embodiment of the invention.
- the invention's at least partly aggregated microcapsules can be advantageously used in all the fields of modern perfumery, i.e. fine or functional perfumery, to positively impart or modify the odor of a consumer product into which said invention's microcapsules are added.
- the microcapsules according to the invention advantageously improve the long-lastingness of the perfume in such consumer products thanks to their improved deposition on the targeted surface to which the consumer product is applied. Consequently, another object of the present invention is a perfuming consumer product comprising, as perfuming ingredient, the invention's at least partly aggregated microcapsules or a perfuming composition as defined above.
- the invention's microcapsules can be added as such or as part of an invention's perfuming composition.
- perfuming consumer product it is meant a consumer product which is expected to deliver at least a pleasant perfuming effect to the surface to which it is applied (e.g. skin, hair, textile, or home surface).
- a perfuming consumer product according to the invention is a perfumed consumer product which comprises a functional formulation, as well as optionally additional benefit agents, corresponding to the desired consumer product, e.g. a detergent or an air freshener, and an effective amount of the invention's microcapsules.
- said perfuming consumer product is a non-edible product.
- Non-limiting examples of suitable perfuming consumer products include a fine perfume, a cologne, an after-shave lotion, a fabric care product, such as a liquid or solid detergent, a fabric softener, a fabric refresher, an ironing water, a paper, or a bleach; a body-care product, such as a hair care product (e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray), a cosmetic preparation (e.g. a vanishing cream or a deodorant or antiperspirant), or a skin-care product (e.g.
- a hair care product e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray
- a cosmetic preparation e.g. a vanishing cream or a deodorant or antiperspirant
- a skin-care product e.g.
- a perfumed soap, shower or bath mousse, oil or gel, or a hygiene product a perfumed soap, shower or bath mousse, oil or gel, or a hygiene product
- an air care product such as an air freshener or a "ready to use" powdered air freshener
- a home care product such as a wipe, a dish detergent or hard-surface detergent, a pet-care product such as an animal litter, a hygiene product such as a diaper, sanitary napkin, a liner or a wipe.
- the perfuming consumer products are preferably hair care products (e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray), and more preferably shampoos or rinse-off conditioners.
- hair care products e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray
- shampoos or rinse-off conditioners e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray
- microcapsules according to the invention can be incorporated into the various aforementioned articles or compositions vary within a wide range of values. These values are dependent on the nature of the article to be perfumed and on the desired organoleptic effect as well as on the nature of the co-ingredients in a given base when the compounds according to the invention are mixed with perfuming co-ingredients, solvents or additives commonly used in the art.
- concentrations are in the order of 0.001% to 5 % by weight, or even more, of the invention's microcapsules based on the weight of the composition into which they are incorporated. Concentrations lower than these, such as in the order of 0.01% to 1% by weight, can be used when these invention's microcapsules are incorporated into perfumed articles, percentage being relative to the weight of the article.
- microcapsules according to the invention to prolong the fragrance release from a surface is another object of the present invention.
- At least one polyisocyanate e.g. Trimethylol propane-adduct of xylylene diisocyanate, Takenate® D-110N, trademark and origin from Mitsui Chemicals and/or Desmodur® N100, trademark and origin from Bayer
- Trimethylol propane-adduct of xylylene diisocyanate Takenate® D-110N, trademark and origin from Mitsui Chemicals and/or Desmodur® N100, trademark and origin from Bayer
- the solution was poured into an aqueous solution comprising a specific emulsifier (see table I) and emulsified for 3 min using an Ultra-Turrax T25 disperser at 13500 rpm to form an Oil-in-Water (O/W) emulsion.
- a specific emulsifier see table I
- O/W Oil-in-Water
- This emulsion was stirred at 400 rpm using a mechanical overhead stirrer and optionally, a NaOH aqueous solution (30 weight % in water) was added to adjust the pH. Then, a polymeric cross-linker bearing amino groups -e.g. Polyethyleneimine, Lupamin® 9030 (trademark from BASF), was added followed by addition of a solution of polyamine e.g. guanidine carbonate, which was slowly added during 1 h. Once the addition of guanidine carbonate was finished, the reaction temperature was gradually elevated to between 50 and 75 °C during 1 h and was kept at 70°C for 3 h. Finally, the formed capsule slurry was cooled down to room temperature.
- a polymeric cross-linker bearing amino groups e.g. Polyethyleneimine, Lupamin® 9030 (trademark from BASF)
- a solution of polyamine e.g. guanidine carbonate
- Polyurea microcapsules according to the invention (Capsules H to L) and control capsules with no polymeric cross-linker (Capsules VI to X) were prepared following the general procedure described above with the following ingredients: Table 4: Composition of Capsules H-L and Control Capsule VI to X Capusles VI H VII I' VIII J IX K X L Ingredient (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) Oil
- the size distribution of the emulsion was first controlled by microscope (Carl Zeiss, AxioScop2, X40) on an average over 10 to 20 isolated droplets.
- the size distribution of the emulsion and the final capsules dispersion was controlled by Optical Microscopy and Light Scattering (Mastersizer S, Malvern). The results are summarized in Table 7.
- Table 8 Composition of the shampoo formulation Ingredient Amount (wt %) Jaguar C-14S 1) (Rodhia) 0.4% Dehyton AB-30 2) (Cognis) 7% Texapon NSO IS 3) (Cognis) 45.0% Dow Corning 2-1691 4) emulsion 3% Cutina AGS 5) (Cognis) 0.9% Rewomid IPP 240 6) (Degussa) 1.2% Cetyl alcohol 1.2% Glydant plus liquid 7) (Lonza) 0.3% Water 41% 1) Guar gum, 2 hydroxy-3-(trimethylammonium)propyl ether chloride, origin: Rhodia, La Défense, France 2) Coco Betain, origin: Cognis, Monheim am Rhein, North Rhine-Westphalia, Germany 3) Sodium lauryl ether sulfate + 2EO,origin: Cognis, Monheim am Rhein, North Rhine-Westphalia, Germany 4) dimethyl(oxo)silane, origin: Dow Corning
- a hair swatch (500 mg) was wetted with 40 mL of tap water flowing at 36-40 °C. Excess water was removed by manually squeezing once. 0.2 mL of unperfumed shampoo was applied along the length of swatch and agitated by fingers. The swatch was rinsed with 100 mL running water and excess water was removed again by squeezing. Then 0.2 mL of shampoo containing 1.33% by weight of capsules A-M and I-XIII relative to the total weight of the shampoo (i.e. shampoo contained 0.4% perfume) was applied along the length of swatch and agitated by fingers. The swatch was then rinsed with 100 mL running water and excess water was shaken off.
- the treated part of the swatch was cut into a glass vial and dried at 60-75 °C. Three repetitions of swatches were treated for reproducibility. 5 ml of ethanol was added to the dry hair and the vial was shaken for 1 h to extract any deposit. The extract was filtered, concentrated and measured on an HPLC for UV absorption. The efficiency of the deposition of the capsules could be determined by comparing the UV absorption of the extract from treated hair swatch versus that directly from 0.2 mL shampoo containing capsules A-M and I-XIII. The results are shown in Table 9.
- each capsules of the present invention can be compared to a control capsules without the polymeric cross-linker bearing amino group.
- the deposition efficiency of Capsules B (according to the invention) is -2 times higher than that of Control Capsules I.
- the deposition efficiency of Capsules C (according to the invention) is -2.4 times higher than that of Control Capsules II.
- the deposition efficiency of Capsules D (according to the invention) is -3.2 times higher than that of Control Capsules III.
- the deposition efficiency of Capsules E (according to the invention) is -1.5 times higher than that of Control Capsules IV.
- Capsules F (not according to the invention) is -2.3 times higher than that of Control Capsules V.
- the deposition efficiency of Capsules H (according to the invention) is -6 times higher than that of Control Capsules VI.
- the deposition efficiency of Capsules I' (according to the invention) is -1.7 times higher than that of Control Capsules VII.
- the deposition efficiency of Capsules J (according to the invention) is -9.4 times higher than that of Control Capsules VIII.
- the deposition efficiency of Capsules K (according to the invention) is -1.7 times higher than that of Control Capsules IX.
- the deposition efficiency of Capsules L (according to the invention) is -1.4 times higher than that of Capsules X.
- the deposition efficiency of Capsules M (not according to the invention) is -2.9 times higher than that of Capsules XI.
- the deposition efficiency of Capsules N (not according to the invention) is -2.0 times higher than that of Capsules XII.
- the deposition efficiency of Capsules O (not according to the invention) is -6.8 times higher than that of Capsules XIII.
- the deposition efficiency of Capsules P (not according to the invention) is -1.4 times higher than that of Capsules XIV.
Description
- The invention relates to the field of delivery systems. More particularly the present invention relates to a process for producing perfume- or flavor-containing microcapsules with improved deposition of encapsulated actives on targeted surfaces such as fiber, hair and skin, which can be used in home or personal care products, as well as to microcapsules obtainable by such a process and consumer products comprising these microcapsules.
- One of the problems faced by the perfumery industry lies in the relatively rapid loss of the olfactive benefit provided by odoriferous compounds due to their volatility, particularly that of "top-notes". This problem is generally tackled using a delivery system, e.g. capsules containing a perfume, to release the fragrance in a controlled manner. Polyurea capsules, formed by polymerisation between a polyisocyanate and a polyamine, are well known capsules that are used in a large variety of technical fields, including perfumery.
- However such delivery systems may suffer from a poor deposition on the substrate for the treatment of which they are intended to be used, such as textile, skin, hair or other surfaces, in particular in rinse off applications wherein the capsules could be washed off leading to weak sensory perception and poor lastingness. Improving the adherence of capsules onto a surface during application is therefore desirable.
- A variety of strategies have been described to improve the deposition of microcapsules on various surfaces. One of the most common solutions disclosed is based on the addition of a deposition aid or on the control of the charge of the shell of the capsules.
WO2012107323 discloses for example polyurea microcapsules providing improved deposition of perfume on treated surface and which are formed by the reaction between a polyisocyanate with an amino acid and guanazole.WO2009153695 relates to a process using a specific stabilizer in the form of aqueous polymers in specific proportion to form polyurea microcapsules bearing permanent positive charges in a single step.US20060216509 also addresses that same technical problem by disclosing a process for the cationization of polyurea capsules by acidification or alkylation to bear permanent positive charges. Despite those disclosures, there is still a need to find new solutions to this problem and provide delivery systems which combine good retention efficiency of an encapsulated active ingredient and improved deposition of that active on a target surface. -
WO 2015/023961 A1 discloses a process for the preparation of capsules comprising the following steps: preparing an oil phase comprising a polyisocyanate and an active material; emulsifying said oil phase in a solution comprising a capsule formation aid; adding to said emulsion a cross-linking agent to form a capsule slurry. The active material is a fragrance. The capsule formation aid is a mixture of polyvinyl alcohol and a copolymer of vinylpyrrolidone and quaternized dimethylaminoethyl methacrylate. The cross-linking agent is a branched polylethylenimine with a molecular weight of 200 to 2 000 000 Da. - The industry is also facing a well-known problem in processes for the preparation of microcapsules which is that of aggregation of said delivery systems among themselves. This phenomenon leads to several drawbacks in particular processing issues during production due to difficulties to control the size distribution of aggregates and viscosity of the produced slurries. This is also detrimental to the aesthetic value of the consumer product wherein the microcapsule dispersion is used. Aggregation is therefore usually something that needs to be avoided or controlled.
- The above-mentioned problem has been addressed by using at least partly aggregated microcapsules which demonstrate an improved deposition on target surfaces, while not compromising the processing of such microcapsules.
- However, there is still a need to improve the deposition of the delivery systems. The present invention provides a solution to the above-mentioned problem by modifying the surface property of the shell of the at least partly aggregated microcapsules capsule. The obtained microcapsules demonstrate an improved deposition on target surfaces.
- The process to prepare microcapsules developed in this invention is well designed to obtain partly aggregated capsules having a shell with particular surface properties. Unexpectedly, the use of at least partly aggregated microcapsules having particular surface properties according to the invention provides an improvement of the deposition of said microcapsules on target surfaces such as fiber, hair and skin without any inconvenience usually associated with aggregates.
- A first object of the invention consists of a process for the preparation of core-shell microcapsules comprising the following steps:
- a) dissolving at least one polyisocyanate having at least two isocyanate groups, in an oil phase preferably comprising a perfume;
- b) dispersing the oil phase obtained in step a) into an aqueous solution comprising as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof ;
- c) adding to the oil-in-water emulsion obtained in step b) a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 g/mol followed by a polyamine with a molecular weight below 250 g/mol to form a microcapsule slurry.
- A second object of the present application consists of polyurea microcapsules as defined in claim 11.
- A third object of the present invention is a perfuming composition comprising
- a) at least partly aggregated perfume microcapsules as defined above;
- b) at least one ingredient selected from the group consisting of a perfumery carrier, a perfuming co-ingredient and mixtures thereof;
- c) optionally at least one perfumery adjuvant.
- Another object of the present invention is a perfuming consumer product comprising the polyurea microcapsules obtained by process described above.
- A last object of the invention is the use of microcapsules as defined above to prolong the release of a fragrance over time.
- Unless otherwise specified, percentages are meant to designate percentages by weight of a composition.
- The process of this invention combines the use of a specific emulsifier together with that of the use of a polymeric cross-linker to generate aggregated droplets stabilized by the emulsifier of the present invention. The addition at the end of the process of a polyamine triggers the interfacial polymerization leading to a core-shell capsules that are at least partly aggregated and with surface property favoring the deposition on the surface such as fiber, hair and skin. A significant improvement of deposition over the known partly aggregated capsules obtained by using a polymeric cross-linker, is observed only by the combination of both features; i.e. a specific emulsifier and the polymeric cross-linker.
- More particularly, the present invention advantageously solves the above-mentioned problems by forming an emulsion using specifically as emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms, characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof and then by adding, before the addition of a polyamine responsible for the interfacial polymerization of the capsules, a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 during the process of the preparation of core-shell microcapsules.
- Therefore, a first object of the present invention is a process for the preparation of core-shell microcapsules comprising the following steps:
- a) dissolving at least one polyisocyanate having at least two isocyanate groups, in an oil phase preferably comprising a perfume;
- b) dispersing the oil phase obtained in step a) into an aqueous solution comprising as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof;
- c) adding to the oil-in-water emulsion obtained in step b) a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 followed by a polyamine with a molecular weight below 250 g/mol to form a microcapsule slurry.
- In the process of the invention, the combination of specific emulsifier as defined above with the use of a cross-linker allows obtaining capsules which deposit particularly well on targeted surfaces.
- In a first step of the process according to the invention, at least one polyisocyanate having at least two isocyanate groups is dissolved in an oil phase preferably comprising a perfume or flavor.
- By "perfume or flavor" (or also "perfume or flavor oil") it is meant a perfume or flavor that is liquid at about 20°C and which will be in the core of the core-shell capsules. According to any one of the above embodiments said perfume or flavor oil in which the polyisocyanate is dissolved in step 1) can be a perfuming or flavoring ingredient alone or a mixture of ingredients, in the form of a perfuming or flavoring composition. As a "perfuming or flavoring ingredient" it is meant here a compound, which is used in a perfuming or flavoring preparation or composition for the primary purpose of imparting a hedonic effect or modulating the odor or taste. In other words such an ingredient, to be considered as being a perfuming or flavoring one, must be able to at least impart or modify in a positive or pleasant way the odor or taste of a composition, and not just as having an odor or taste. Said ingredient can on top of their primary purpose provides secondary benefits, including but not limited to malodour counteraction, antimicrobial effect, microbial stability, food preservation, sanitization, insect repellence or taste-masking. The nature and type of the perfuming or flavoring ingredients present in the perfume or flavor oil do not warrant a more detailed description here, which in any case would not be exhaustive, a skilled person in the art being able to select them on the basis of his general knowledge and according to the intended use or application and the desired organoleptic effect sought. In general terms, these perfuming or flavoring ingredients belong to chemical classes as varied as alcohols, aldehydes, ketones, esters, ethers, acetates, nitriles, terpenoids, nitrogenous or sulphurous heterocyclic compounds and essential oils, and said perfuming or flavoring ingredients can be of natural or synthetic origin. Many of these ingredients are listed in reference texts such as the book by S. Arctander, Perfume and Flavor Chemicals, 1969, Montclair, New Jersey, USA, or its more recent versions, or in other works of a similar nature, as well as in the abundant patent literature in the field of perfumery or flavor. It is also understood that said ingredients may also be compounds able to release in a controlled manner various types of perfuming or flavoring compounds, including what is referred to as "pro-perfumes or pro-flavors".
- In case of a perfume, the perfuming ingredient(s) to be encapsulated may be dissolved in a solvent of current use in the perfume industry. Thus, the core of the capsule might be pure perfuming ingredients or a mixture of perfuming ingredients in an adequate hydrophobic solvent. The solvent is preferably not an alcohol. Examples of such solvents are diethyl phthalate, isopropyl myristate, Abalyn® (rosin resins, available from Eastman), benzyl benzoate, ethyl citrate and isoparaffins. Preferably, the perfume oil comprises less than 20% and more preferably less than 10% of solvent, all these percentages being defined by weight relative to the total weight of the perfume. Most preferably, the perfume is essentially free of solvent.
- According to a particular embodiment of the invention, the perfume contains less than 10% of its own weight of primary alcohols, less than 15% of its own weight of secondary alcohols and less than 20% of its own weight of tertiary alcohols. Preferably, the perfume does not contain any primary alcohols and contains less than 15% of secondary and tertiary alcohols. Such limited amounts of alcohols have the advantage of reducing the amount of isocyanate functional groups reacting with the perfume.
- According to any one of the invention's embodiments, the concentration of perfume is comprised between 10% and 60% by weight, relative to the total weight of the microcapsule slurry.
- According to a particular embodiment, the oil phase comprises a perfume oil and the polyisocyanate.
- According to a particular embodiment, the oil phase consists essentially of the perfume oil and the polyisocyanate.
- According to another embodiment, the oil phase comprises a perfume together with other active ingredient(s) with the primary purpose of delivering another benefit than the perfume and to be co-released with the perfume. Non limiting example of such active include a cosmetic, skin caring, malodor counteracting, bactericide, fungicide, pharmaceutical or agrochemical ingredient, a sanitizing agent, a diagnostic agent and/or an insect repellent or attractant.
- The at least one polyisocyanate dissolved in the perfume or flavor to form the oil phase can be any type of polyisocyanate comprising at least two isocyanate groups. Preferably it contains at least three isocyanate groups. The polyamine added in step c) of the process will react with those functional groups by interfacial polymerization to form the core-shell structure of the capsules. Following these numbers of functional groups, an optimal reticulation or network of the capsules wall will be achieved, providing microcapsules exhibiting a prolonged slow release of fragrances, as well as an improved stability in the consumer product. Low volatility polyisocyanate molecules are preferred because of their low toxicity.
- Preferably, the at least one polyisocyanate is an aliphatic polyisocyanate, an aromatic polyisocyanate or a mixture thereof. When the at least one polyisocyanate is in the form of a mixture of aliphatic and aromatic polyisocyanates, the at least one aliphatic polyisocyanate and the at least one aromatic polyisocyanate are preferably used in a respective molar ratio comprised between 80:20 and 10:90, more preferably between 75:25 and 20:80, even more preferably between 60:40 and 20:80 and most preferably between 60:40 and 30:70. Such molar ratio is defined as the relative ratio of the number of moles of isocyanate groups provided by the at least one aliphatic polyisocyanate and the number of moles of the isocyanate groups provided by the at least one aromatic polyisocyanate.
- The term "aromatic polyisocyanate" is meant here as encompassing any polyisocyanate comprising an aromatic moiety. Preferably, it comprises a phenyl, a toluyl, a xylyl, a naphthyl or a diphenyl moiety, more preferably a toluyl or a xylyl moiety. Preferred aromatic polyisocyanates are biurets and polyisocyanurates, more preferably comprising one of the above-cited specific aromatic moieties. More preferably, the aromatic polyisocyanate is a polyisocyanurate of toluene diisocyanate (commercially available from Bayer under the tradename Desmodur® RC), a trimethylol propane-adduct of toluene diisocyanate (commercially available from Bayer under the tradename Desmodur® L75), a trimethylol propane-adduct of xylylene diisocyanate (commercially available from Mitsui Chemicals under the tradename Takenate® D-110N). In a most preferred embodiment, the aromatic polyisocyanate is a trimethylol propane-adduct of xylylene diisocyanate.
- The term "aliphatic polyisocyanate" is defined as a polyisocyanate which does not comprise any aromatic moiety. Preferred aliphatic polyisocyanates are a trimer of hexamethylene diisocyanate, a trimer of isophorone diisocyanate, a trimethylol propane-adduct of hexamethylene diisocyanate (available from Mitsui Chemicals) or a biuret of hexamethylene diisocyanate (commercially available from Bayer under the tradename Desmodur® N100), among which a biuret of hexamethylene diisocyanate is even more preferred.
- Examples of preferred specific mixtures of at least one aliphatic polyisocyanate and of at least one aromatic polyisocyanate are mixtures of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of xylylene diisocyanate, mixtures of a biuret of hexamethylene diisocyanate with a polyisocyanurate of toluene diisocyanate and mixtures of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of toluene diisocyanate. Most preferably, it is a mixture of a biuret of hexamethylene diisocyanate with a trimethylol propane-adduct of xylylene diisocyanate.
- Preferably the at least one polyisocyanate is used in an amount comprised between 1 and 40%, preferably between 2 and 20% by weight, relative to the total weight of oil phase.
- In step b) of the process of the present invention, the oil phase is dispersed into an aqueous solution comprising as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecules produced by living organisms; iii) a biomacromolecules produced by living organisms characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof. This particular selection of emulsified has shown to boost the deposition properties of the capsules prepared according to the process of the invention.
- The term "emulsion" is meant to designate the fact that the oil phase obtained in step a) is dispersed in an aqueous solution. The term "emulsion" is therefore understood as emulsion or dispersion. The presence of an emulsifier in the aqueous solution allows the stabilization of the oil droplets therein. In the present invention a colloidal stabilizer could be used as emulsifier. The emulsion may be prepared by high shear mixing and adjusted to the desired droplet size. Droplet size may be checked with light scattering measurements or microscopy. This procedure does not require a more detailed description as it is well known to a skilled person in the art.
- By "biomacromolecule produced by living organisms" it is meant biopolymer. Biopolymers are characterized by molecular weight distributions ranging from 1,000 (1 thousand) to 1,000,000,000 (1 billion) Daltons. These macromolecules may be carbohydrates (sugar based) or proteins (amino-acid based) or a combination of both (gums) and can be linear or branched. In the context of this invention, the biomacromolecules or biopolymers are preferentially surface active materials and should be amphiphilic or anionic namely negatively charged in water at a pH greater than 9.
- By "modified polyvinyl alcohol", it should be understood a polyvinyl alcohol with functional group(s) other than hydroxyl on its side chain.
- The specific emulsifier used has an impact on the property of the surface of the capsule shell. In particular, the use of the selected as emulsifiers has shown to provide capsules with significantly improved deposition substrates such as hair, skin or tissue.
- According to a particular embodiment, the emulsifier is a biomacromolecule produced by living organisms which is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof. Suitable gum Arabic includes in particular Acacia Senegal, Acacia Seyal and mixtures thereof. Preferably, the biopolymer is gum Arabic or modified starch.
- According to another particular embodiment, the emulsifier is a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms which is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof.
- According to another particular embodiment, the emulsifier is a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide.
- In a first embodiment of the invention, the pH of the oil-in-water emulsion obtained in step b) is adjusted above 12 before the addition of the polymeric cross-linker bearing amino groups. The pH is adjusted by the addition of a base. The said base may be selected from the group consisting of NaOH and KOH.
- In a second embodiment of the invention, the pH of the oil-in-water emulsion obtained in step b) is not modified before the addition of polymeric cross-linker bearing amino groups and is below 12, preferably above 6.
- In a third embodiment of the invention, the pH of the oil-in-water emulsion obtained in step b) is adjusted between 12 and 6 before the addition of polymeric cross-linker bearing amino groups and. The pH is adjusted by the addition of a base as mentioned above.
- The pH can be adjusted as a function of the level of aggregation required. The higher the pH is, the higher the level of aggregation is.
- In step c) of the process of the invention, a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 is added to the emulsion, followed by a polyamine with a molecular weight below 250 g/mol.
- In the process of the invention, a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000g/mol, preferably higher than 50 000 acts as a cross-linking reagent. In particular it forms aggregated or surface coated microcapsules through intermolecular forces such as electrostatic interaction, hydrogen bonding and interfacial reactions. The presence of this polymeric cross-linker in the process is essential as it allows providing microcapsules that are at least partly aggregated. The level of aggregation provided by the process of the invention is such that the at least partly aggregated microcapsules are still susceptible of being processed at an industrial scale.
- It is essential to the process of the invention that the polymeric cross-linker bearing amino groups at the origin of the generation of aggregated droplets is added before the polyamine that is going to react with the polyisocyanate by interfacial polymerization. The amino groups of the polymeric cross-linker react through interfacial reaction with the isocyanate functional groups of two different droplets to form covalent bonds between drops, which leads to at least partial aggregation.
- The polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight equal or higher than 2 000 g/mol. Preferably the polymeric cross-linker bearing amino groups has a molecular weight higher than 50 000 g/mol. Even more preferably, the polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight higher than 200 000 g/mol. Even more preferably, the polymeric cross-linker bearing amino groups used in the process of the invention has a molecular weight comprised between 200 000 g/mol and 800 000 g/mol.
- By the term "molecular weight", it is meant, in case of the polymeric cross-linker, the average molecular weight.
- According to a particular embodiment, said polymeric cross-linker is a polymeric cross-linker bearing primary amino groups. By the term primary amino groups, it is meant the normal meaning in the art, i.e. primary amine functional groups wherein a nitrogen atom is substituted by two hydrogen atoms and one hydrocarbonyl group.
- According to a particular embodiment, said polymeric cross-linker bearing amino groups is selected from the group consisting of polyvinylamines such as those sold under the trade name Lupamine® (trademark from BASF and commercially available from BASF), polyethyleimines such as those sold under the trade name Lupasol® (trademark from BASF and commercially available from BASF), polyaminoethylacrylates and mixtures thereof.
- More preferably the polymeric cross-linker bearing amino groups is selected from the group consisting of a polyvinylamine and a polyethyleimine.
- Without being bound by theory, it is believed that the polymeric cross-linker bearing amino groups is responsible for the at least partial aggregation of the microcapsules. In particular said polymeric cross-linker acts as a cross-linking reagent and forms aggregated or surface coated droplets through interfacial reactions. On the other hand, the polyamine allows forming the core-shell capsules by reacting with isocyanate functional groups through interfacial polymerization.
- According to a preferred embodiment, the polymeric cross-linker bearing amino groups and the emulsifier are used in a weight ration based on dry matter comprised between 0.1 and 10, more preferably between 0.5 and 2.
- For the purpose of the present invention, the polyamine may be used alone, or be admixed with glycerine.
- Preferably said polyamine is selected from the group consisting of 1,2-diaminopropane, 1,2-diaminoethane, diethylenetriamine, guanidine, water soluble guanidine salts, tris-(2-aminoethyl)amine, N,N,N',N'-tetrakis(3-aminopropyl)-1,4-butanediamine, N,N'-bis(3-aminopropyl)-ethylenediamine and 3,5-diamino-1,2,4-triazole.
- More preferably, the polyamine with a molecular weight below 250 g/mol is selected from the group consisting of water-soluble guanidine salts, guanidine, tris-(2-aminoethyl)amine, N,N'-bis(3-aminopropyl)-ethylenediamine, 3,5-diamino-1,2,4-triazole and N,N,N',N'-tetrakis(3-aminopropyl)-1,4-butanediamine. Most preferably it is selected from guanidine, water-soluble guanidine salts, 3,5-diamino-1,2,4-triazole and N,N'-bis(3-aminopropyl)-ethylenediamine. By "water soluble guanidine salt" it is meant a salt soluble in water and resulting from the reaction of guanidine with an acid. One example of such salts is guanidine carbonate.
- The amount of polyamine used is typically adjusted so that, for each mole of isocyanate group dissolved in the perfume or flavor in step a), there is added from 0.5 to 3 moles of amine groups in step c). Preferably, for each mole of isocyanate group dissolved in the perfume or flavor in step a), 1 to 3, more preferably 1 to 2 moles of amine groups are added in step c).
- During final polymerization, temperature is typically comprised between 50 and 75°C.
- The specific composition of the polyurea wall is key in obtaining microcapsules that are at the fine balance between release and retention so as to achieve satisfactory release of fragrances, once the capsules are placed on textiles or hair, while showing the desired stability in the product base (e.g. counteracts efficiently the extraction of the perfume by the surfactants of the consumer product) and improved deposition thanks to the controlled aggregation and the specific emulsifier. Therefore the selection of the polyamine and of the polyisocyanate, among the ones mentioned above, enables the fine tuning of the properties and stability of the capsules. On the other hand, the use of the specific emulsifier and the addition of the polymeric cross-linker before the addition of the polyamine allow the improvement of the deposition onto different types of surfaces of the microcapsules. In particular, the use of emulsifier of the present invention allows stabilizing the droplets of the emulsion before the addition of a polymeric cross-linker with high molecular weight leads to the formation of covalent bonds between drops of the dispersion obtained in step b) which results in a partly aggregated microcapsule slurry. The degree of aggregation is controlled by selecting the polymeric cross-linker bearing amino groups and/or adjusting the pH of the oil-in-water emulsion obtained in step b) before the addition of the polymeric cross-linker bearing amino groups followed by a polyamine. Furthermore, the property of the surface of the shell of the microcapsules of the present invention is greatly influence by the emulsifier.
- In an optional step of the process of the invention, the microcapsules can be isolated from the slurry. In another optional step, the microcapsules slurry can be dried in a generally known manner to form a polyurea microcapsules powder. Any drying method known to a skilled person in the art can be used including, but not limited to fluidized bed or spray-drying tower with co-current or counter current air streams with atomizing devices of different configuration, such as two-fluid nozzles, rotary nozzles or ultrasonic nozzles. In particular the slurry may be spray-dried preferably in the presence of a polymeric carrier material such as polyvinyl acetate, polyvinyl alcohol, dextrines, maltodextrines, glucose syrups, natural or modified starch, vegetable gums, gum acacia, pectins, xanthanes, alginates, carragenans or cellulose derivatives to provide microcapsules in a powder form. A broad range of suitable spray drying configurations is available from companies like GEA-Niro (Denmark).
- The present invention provides microcapsules comprising:
- a polyurea wall, which comprises the reaction product of the polymerization between at least one polyisocyanate having at least two isocyanate groups and a polyamine with a molecular weight below 250 g/mol in the presence of a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, preferably higher than 50 000 g/mol;
- as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecules produced by living organisms; iii) a biomacromolecules produced by living organisms characterized in that the biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof ; and
- a core comprising perfume , said microcapsules being at least partly aggregated. Said at least partly aggregated microcapsules can be characterized by an agglomeration ratio defined as the ratio between the average size of the at least partly aggregated microcapsules to the average droplet size of the emulsion obtained in step b). Said ratio is comprised between 1.1 and 25, preferably between 1.1 and 10. The aggregated microcapsules have a non-spherical shape which results in larger contact area toward the targeted surface. The deposition of non-spherical aggregated microcapsules is improved compared to that of spherical capsules.
- The present invention provides microcapsules comprising a core comprising a perfume; i.e. the microcapsules of the present invention are perfume microcapsules.
- What is meant by average droplet size is a number averaged diameter measured with a microscope on an average over 10 to 20 isolated droplets. This method is well known in the art and does not warrant a more detailed description here. A person skilled in the art is able to measure the average droplet size of the emulsion based on his general knowledge. The average size of at least partly aggregated microcapsules is determined using light scattering which is also a well-known method in the art to characterize a size distribution. Detail of the both methods are given is the experimental part.
- The at least partly aggregated microcapsules of the invention can be advantageously used for the controlled release of the encapsulated perfume or flavor while improving the deposition of said microcapsules on a target surface. This is particularly advantageous in the perfumery industry in what is commonly referred to as "rinse off' applications which usually suffer from the problem of losing the encapsulated perfume during rinsing and therefore hardly provide any perfume long-lasting. It is therefore particularly appreciated to include these microcapsules as perfuming ingredients in a perfuming composition or in perfumed consumer products.
- Therefore, another object of the present invention is a perfuming composition comprising:
- i) at least partly aggregated perfume microcapsules as defined above;
- ii) at least one ingredient selected from the group consisting of a perfumery carrier, a perfuming co-ingredient and mixtures thereof; and
- iii) optionally at least one perfumery adjuvant.
- By "perfumery carrier" it is meant a material which is practically neutral from a perfumery point of view i.e. that does not significantly alter the organoleptic properties of perfuming ingredients. Said carrier may be a liquid or a solid.
- As liquid carrier one may cite, as non-limiting examples, an emulsifying system, i.e. a solvent and a surfactant system, or a solvent commonly used in perfumery. A detailed description of the nature and type of solvents commonly used in perfumery cannot be exhaustive. However, one can cite as non-limiting examples solvents such as dipropyleneglycol, diethyl phthalate, isopropyl myristate, benzyl benzoate, 2-(2-ethoxyethoxy)-1-ethanol or ethyl citrate, which are the most commonly used. Other suitable perfumery carriers than those previously specified, can be also ethanol, water/ethanol mixtures, limonene or other terpenes, isoparaffins such as those known under the trademark Isopar® (origin: Exxon Chemical) or glycol ethers and glycol ether esters such as those known under the trademark Dowanol® (origin: Dow Chemical Company).
- As solid carriers one may cite, as non-limiting examples, absorbing gums or polymers. Examples of such materials may comprise wall-forming and plasticizing materials, such as mono, di- or trisaccharides, natural or modified starches, hydrocolloids, cellulose derivatives, polyvinyl acetates, polyvinylalcohols, proteins or pectins, or yet the materials cited in reference texts such as H. Scherz, Hydrokolloide: Stabilisatoren, Dickungs- und Geliermittel in Lebensmitteln, Band 2 der Schriftenreihe Lebensmittelchemie, Lebensmittelqualität, Behr's Verlag GmbH & Co., Hamburg, 1996.
- By "perfuming co-ingredient", it is meant an ingredient equivalent to what has been defined above as perfume ingredient. Said ingredient can take the form of a liquid oil, but can also be present in the form of a delivery system such as a perfume precursor, microcapsules, emulsions, dispersions or powders.
- By "perfumery adjuvant" what is meant here is an ingredient capable of imparting additional added benefit such as a color, a particular light resistance, chemical stability, etc. A detailed description of the nature and type of adjuvant commonly used in perfuming compositions cannot be exhaustive, but it has to be mentioned that said ingredients are well known to a person skilled in the art.
- An invention's composition consisting of the invention's perfume microcapsules and at least one perfumery carrier represents a particular embodiment of the invention.
- The invention's at least partly aggregated microcapsules can be advantageously used in all the fields of modern perfumery, i.e. fine or functional perfumery, to positively impart or modify the odor of a consumer product into which said invention's microcapsules are added. The microcapsules according to the invention advantageously improve the long-lastingness of the perfume in such consumer products thanks to their improved deposition on the targeted surface to which the consumer product is applied. Consequently, another object of the present invention is a perfuming consumer product comprising, as perfuming ingredient, the invention's at least partly aggregated microcapsules or a perfuming composition as defined above.
- The invention's microcapsules can be added as such or as part of an invention's perfuming composition.
- For the sake of clarity, it has to be mentioned that, by "perfuming consumer product" it is meant a consumer product which is expected to deliver at least a pleasant perfuming effect to the surface to which it is applied (e.g. skin, hair, textile, or home surface). In other words, a perfuming consumer product according to the invention is a perfumed consumer product which comprises a functional formulation, as well as optionally additional benefit agents, corresponding to the desired consumer product, e.g. a detergent or an air freshener, and an effective amount of the invention's microcapsules. For the sake of clarity, said perfuming consumer product is a non-edible product.
- The nature and type of the constituents of the perfuming consumer product (functional formulation and optionally benefit agents) do not warrant a more detailed description here, which in any case would not be exhaustive, the skilled person being able to select them on the basis of his general knowledge and according to the nature and the desired effect of said product.
- Non-limiting examples of suitable perfuming consumer products include a fine perfume, a cologne, an after-shave lotion, a fabric care product, such as a liquid or solid detergent, a fabric softener, a fabric refresher, an ironing water, a paper, or a bleach; a body-care product, such as a hair care product (e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray), a cosmetic preparation (e.g. a vanishing cream or a deodorant or antiperspirant), or a skin-care product (e.g. a perfumed soap, shower or bath mousse, oil or gel, or a hygiene product); an air care product, such as an air freshener or a "ready to use" powdered air freshener; or a home care product, such as a wipe, a dish detergent or hard-surface detergent, a pet-care product such as an animal litter, a hygiene product such as a diaper, sanitary napkin, a liner or a wipe.
- According to a preferred embodiment, the perfuming consumer products are preferably hair care products (e.g. a shampoo, a hair conditioner, a coloring preparation or a hair spray), and more preferably shampoos or rinse-off conditioners.
- The proportions in which the microcapsules according to the invention can be incorporated into the various aforementioned articles or compositions vary within a wide range of values. These values are dependent on the nature of the article to be perfumed and on the desired organoleptic effect as well as on the nature of the co-ingredients in a given base when the compounds according to the invention are mixed with perfuming co-ingredients, solvents or additives commonly used in the art.
- For example, in the case of perfuming compositions, typical concentrations are in the order of 0.001% to 5 % by weight, or even more, of the invention's microcapsules based on the weight of the composition into which they are incorporated. Concentrations lower than these, such as in the order of 0.01% to 1% by weight, can be used when these invention's microcapsules are incorporated into perfumed articles, percentage being relative to the weight of the article.
- The use of the microcapsules according to the invention to prolong the fragrance release from a surface is another object of the present invention.
- The invention will now be described in further details by way of the following examples, which should not be considered as limiting the invention. In the examples, unless otherwise specified, the abbreviations have the usual meaning in the art and the temperatures are indicated in degrees centigrade (°C).
- At least one polyisocyanate (e.g. Trimethylol propane-adduct of xylylene diisocyanate, Takenate® D-110N, trademark and origin from Mitsui Chemicals and/or Desmodur® N100, trademark and origin from Bayer) was dissolved in a perfume. The solution was poured into an aqueous solution comprising a specific emulsifier (see table I) and emulsified for 3 min using an Ultra-Turrax T25 disperser at 13500 rpm to form an Oil-in-Water (O/W) emulsion. This emulsion was stirred at 400 rpm using a mechanical overhead stirrer and optionally, a NaOH aqueous solution (30 weight % in water) was added to adjust the pH. Then, a polymeric cross-linker bearing amino groups -e.g. Polyethyleneimine, Lupamin® 9030 (trademark from BASF), was added followed by addition of a solution of polyamine e.g. guanidine carbonate, which was slowly added during 1 h. Once the addition of guanidine carbonate was finished, the reaction temperature was gradually elevated to between 50 and 75 °C during 1 h and was kept at 70°C for 3 h. Finally, the formed capsule slurry was cooled down to room temperature.
- Polyurea microcapsules according to the invention (Capsules A to E) and comparative capsules (Capsules I to V) were prepared following the general procedure with the following ingredients:
Table 1: Composition of Capsules A to E and Comparative Capsules I to IV Capsules I A B II C III D IV E Ingredient (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) Oil phase Perfume1) 28.50 28.50 28.50 28.50 28.50 28.50 28.50 28.50 28.5 0 Uvinul A Plus2) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Polyisocyanate Takenate® D-110N3) 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 Polyamine Guanidine carbonate 0.88 0.88 0.88 0.88 0.88 0.88 0.88 0.88 0.88 Polyvinyl alcohol Mowiol 18-884) 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 Cationic polymer Luviquat PQ-11 PN5) 0.30 0.30 0.30 0.00 0.00 0.00 0.00 0.00 0.00 Cationic polymer Tilamar Quat 6406) 0.00 0.00 0.00 0.86 0.86 0.00 0.00 0.00 0.00 Cationic polymer Salcare Super 77) 0.00 0.00 0.00 0.00 0.00 0.75 0.75 0.00 0.00 Cationic polymer Salcare SC608) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.70 0.70 Polymeric cross-linker Lupamin 90309) 0.00 3.00 5.00 0.00 5.00 0.00 5.00 0.00 3.00 NaOH 0.20 1.8 1.8 0.21 1.8 0.22 1.8 0.20 1.8 Water 63.27 58.67 56.67 62.70 56.11 62.80 56.22 62.87 58.2 7 1) Perfuming composition having the ingredients of Table 3.
2) Used as a tracer for the quantification of oil deposition, origin: BASF, Germany
3) Trimethylol propane-adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan
4) Polyvivyl alcohol, origin: Kuraray Specialities Europe GmbH, Germany
5) Quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, origin: BASF, Germany.
6) Polydiallyldimethyl ammonium chloride, supplied as a 34-36% solution in water. Origin: DSM Nutritional Products Ltd., Basel, Switzerland.
7) Copolymer of allyl dimethyl ammonium chloride/ acrylamide, supplied as a 40% solution in water. Origin: BASF, Germany.
8) Copolymer of acrylamidopropyltrimonium chloride and acrylamide. Origin: BASF, Germany.
9) Polyethyleneimine, origin: BASF, Germany.Table 2: Composition of Capsules F and G and Comparative Capsule V Compar ative Capsule V Capsule F Capsule G Ingredient Amount (wt %) (wt %) (wt %) Oil phase Perfume1) 28.50 28.50 28.50 Uvinul A Plus2) 1.5 1.5 1.5 Polyisocyanate Takenate® D-110N3) 5.24 5.24 5.24 Polyamine Guanidine carbonate 0.88 0.88 0.88 Polyvinyl alcohol Mowiol 18-884) 0.11 0.11 0.11 Cationic polymer Conditioneze NT-205) 1.5 1.5 1.5 Polymeric cross-linker Lupamin 90306) 0.00 3.00 5.00 NaOH 0.20 1.8 1.8 Water 62.07 57.47 55.47 1) Perfuming composition having the ingredients of Table 3.
2) Used as a tracer for the quantification of oil deposition, origin: BASF, Germany
3) Trimethylol propane-adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan
4) Polyvivyl alcohol, origin: Kuraray Specialities Europe GmbH, Germany
5) Copolymer of vinylpyrrolidone and methacrylamidopropyl trimethylammonium chloride (not according to the invention), supplied as a 20% viscous solution in water. International Specialty Products, Germany.
6) Polyethyleneimine, origin: BASF, Germany.Table 3: Composition of the perfume Ingredient LogP Amount (wt %) Allyl (cyclohexyloxy)-acetatea) 2.72 1.2 2,4-Dimethyl-3-cyclohexene-1-carbaldehydeb) 2.85 1.2 Menthone 2.87 1.7 Hedione®c) 2.98 5.8 Camphor 3.04 2.9 Eucalyptol 3.13 5.8 Dihydromyrcenold) 3.47 11.5 Rose oxyde 3.58 0.9 Isobornyl acetate 3.86 11.5 Delta damascone 4.13 0.6 Cashmeran®e) 4.31 2.3 Terpenyl acetate 4.34 5.8 Lilial®f) 4.36 17 Linalyl acetate 4.39 2.3 Neobutenone® alphag) 4.45 1.2 Dihydromyrcenyl acetate 4.47 2.3 2- Methylundecanal 4.67 3.5 Iso E Super®h) 4.71 11.5 Cetalox®i) 4.76 0.6 Isoraldeine® 70j) 4.84 2.3 Habanolide®k) 4.88 4.6 Precyclemone Bl) 5.18 3.5 Total 100.0 a) Origin: Symrise, Holzminden, Germany
b) Origin: Firmenich SA, Geneva, Switzerland
c) Methyl dihydrojasmonate, origin: Firmenich SA, Geneva, Switzerland
d) Origin: International Flavors & Fragrances, USA
e) 1,2,3,5,6,7-Hexahydro-1,2,3,3-pentamethyl-4h-inden-4-one, origin: International Flavors & Fragrances, USA
f) 3-(4-Tert-butylphenyl)-2-methylpropanal, origin: Givaudan SA, Vernier, Switzerland
g) 1-(5,5-Dimethyl-1-cyclohexen-1-yl)-4-penten-1-one, origin: Firmenich SA, Geneva, Switzerland
h) 1-(Octahydro-2,3,8,8-tetramethyl-2-naphtalenyl)-1-ethanone, origin: International Flavors & Fragrances, USA
i) Dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b]furan, origin: Firmenich SA, Geneva, Switzerland
j) 3-Methyl-4-(2,6,6-trimethyl-2cyclohexen-1-yl)-3-buten-2-one, origin: Givaudan SA, Vernier, Switzerland
k) Pentadecenolide, origin: Firmenich SA, Geneva, Switzerland 1) 1-Methyl-4-(4-methyl-3-pentenyl)cyclohex-3-ene-1-carboxaldehyde, origin: International Flavors & Fragrances, USA - Polyurea microcapsules according to the invention (Capsules H to L) and control capsules with no polymeric cross-linker (Capsules VI to X) were prepared following the general procedure described above with the following ingredients:
Table 4: Composition of Capsules H-L and Control Capsule VI to X Capusles VI H VII I' VIII J IX K X L Ingredient (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) (wt %) Oil phase Perfume1) 28. 50 28.50 28.50 28.50 28.50 28.50 28.50 28.50 28.50 28.5 0 Uvinul A Plus2) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 Polyisocyanate Takenate® D-110N3) 5.2 4 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 5.24 Polyamine Guanidine carbonate 0.8 8 0.88 0.88 0.88 0.88 0.88 0.88 0.88 0.88 0.88 Bioploymer Gum Arabic Superstab4) 1.5 0 1.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Bioploymer Gum Arabic LowCost4) 0.0 0 0.00 1.50 1.50 0.00 0.00 0.00 0.00 0.00 0.00 Biopolymer Gum Purity 2000 IP5) 0.0 0 0.00 0.00 0.00 1.00 1.00 0.00 0.00 0.00 0.00 Biopolymer Gum AR5006) 0.0 0 0.00 0.00 0.00 0.00 0.00 1.50 1.50 0.00 0.00 Biopolymer HI-CAP 1007) 0.0 0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 1.00 1.00 Polymeric cross-linker Lupamin 90308) 0.0 0 5.00 0.00 3.00 0.00 5.00 0.00 5.00 0.00 5.00 NaOH 0.2 0 1.8 0.20 1.8 0.2 1.8 0.2 1.8 0.20 1.8 Water 62. 18 55.58 62.07 57.58 62.68 56.08 62.18 55.58 62.68 56.0 8 1) Perfuming composition having the ingredients of Table 3.
2) Used as a tracer for the quantification of oil deposition, origin: BASF, Germany.
3) Trimethylol propane-adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan.
4) Origin: Nexira, France.
5) Origin: Ingredion, Germany.
6) Origin: Alland & Robert, France.
7) Modified starch. Origin: Ingredion, USA.
8) Polyethyleneimine, origin: BASF, Germany. - Polyurea microcapsules not according to the invention (Capsules M to N) and control capsules with no polymeric cross-linker (Capsules XI and XII) were prepared following the general procedure described above with the following ingredients:
Table 5: Composition of Capsules M-N and Control Capsule XI and XII Control Capsule XI Capsules M Control Capsule XII Capsules N Ingredient Amount (wt %) Amount (wt %) Amount (wt %) Amount (wt %) Oil phase Perfume1) 28.50 28.50 28.50 28.50 Uvinul A Plus2) 1.5 1.5 1.5 1.5 Polyisocyanate Takenate® D-110N3) 5.24 5.24 5.24 5.24 Polyamine Guanidine carbonate 0.88 0.88 0.88 0.88 Polyvinyl alcohol Mowiol 18-884) 0.11 0.11 0.11 0.11 Bioploymer Jaguar C13S5) 0.70 0.70 0.00 0.00 Biopolymer SoftCAT SX-1300X6) 0.00 0.00 0.70 0.70 Polymeric cross-linker Lupamin 90307) 0.00 3.00 0.00 3.00 NaOH 0.20 1.8 0.20 1.8 Water 62.87 58.27 62.87 58.27 1) Perfuming composition having the ingredients of Table 3.
2) Used as a tracer for the quantification of oil deposition, origin: BASF, Germany
3) Trimethylol propane-adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan
4) Polyvivyl alcohol, origin: Kuraray Specialities Europe GmbH, Germany
5) Guar Hydroxypropyltrimonium chloride. Origin: Solvay, Belgium.
6) Quaternized hydroxyethyl cellulose. Origin: The Dow Chemical Company, USA.
7) Polyethyleneimine. Origin: BASF, Germany. -
Table 6: Composition of Capsules O-P and Control Capsules XIII to XIV Control Capsule XIII Capsule O Control Capsule XIV Capsule P Ingredient Amount (wt %) Amount (wt %) Amount (wt %) Amount (wt %) Oil phase Perfume1) 28.50 28.50 28.50 28.50 Uvinul A Plus2) 1.5 1.5 1.5 1.5 Polyisocyanate Takenate® D-110N3) 5.24 5.24 5.24 5.24 Polyamine Guanidine carbonate 0.88 0.88 0.88 0.88 Modified polyvinyl alcohol Poval R-11304) 2.00 2.00 0.00 0.00 Modified polyvinyl alcohol Gohsenx K-4345) 0.00 0.00 1.36 1.36 Polymeric cross-linker Lupamin 90306) 0.00 3.00 0.00 5.00 NaOH 0.10 1.8 0.10 1.8 Water 61.78 57.08 62.42 55.72 1) Perfuming composition having the ingredients of Table 3.
2) Used as a tracer for the quantification of oil deposition, origin: BASF, Germany.
3) Trimethylol propane-adduct of xylylene diisocyanate, origin: Mitsui Chemicals, Inc., Japan.
4) Modified polyvinyl alcohol containing silanol groups, origin: Kuraray Specialities Europe GmbH, Germany.
5) Modified polyvinyl alcohol having a cationic group (quaternary ammonium salt) on its side chain, origin: Nippon Gohsei, Japan.
6) Polyethyleneimine. Origin: BASF, Germany - The size distribution of the emulsion was first controlled by microscope (Carl Zeiss, AxioScop2, X40) on an average over 10 to 20 isolated droplets. The size distribution of the emulsion and the final capsules dispersion was controlled by Optical Microscopy and Light Scattering (Mastersizer S, Malvern). The results are summarized in Table 7.
Table 7: Emulsion droplet size and capsule size of Capsules A to P and Control Capsule I to XIV Capsules NaOH pH Emulsion Droplet size D[4,3], µm Capsule size, D[4,3], µm Agglomeration ratio I 0.20 8.19 13.5 13.5 1.0 A 1.8 9.59 10.3 79.6 7.7 B 1.8 9.67 10.3 141 13.7 II 0.21 8.44 12.3 9.61 0.78 C 1.8 9.53 13.0 168 12.9 III 0.22 8.42 11.7 9.61 0.82 D 1.8 9.52 11.9 69 5.8 IV 0.2 8.71 12.9 14.9 1.2 E 1.8 9.29 6.89 39.2 5.7 V 0.20 8.61 12.4 12.7 1.0 F 1.8 9.50 9.21 106 11.5 G 1.8 9.52 9.21 176 19.1 VI 0.20 8.64 5.85 7.59 1.3 H 1.8 9.31 6.77 70.1 10.3 VII 0.2 8.17 15.6 135 8.7 I' 1.8 9.48 18.9 245 13 VIII 0.2 8.66 14.3 9.02 0.63 J 1.8 9.28 11.8 289 24.5 IX 0.2 8.02 6.32 7.03 1.1 K 1.8 9.33 6.09 56.3 9.2 X 0.2 7.96 7.73 8.87 1.1 L 1.8 9.27 7.48 65.7 8.8 XI 0.2 8.02 17.2 8.53 0.5 M 1.8 9.51 24.0 39.9 1.7 XII 0.2 7.86 15.7 16.3 1.0 N 1.8 9.50 18.8 89.2 4.7 XIII 0.1 8.20 2.05 7.92 3.9 O 1.8 9.73 2.58 17.9 6.9 XIV 0.1 8.28 5.74 6.75 1.2 P 1.8 9.44 11.2 46.2 4.1 -
Table 8: Composition of the shampoo formulation Ingredient Amount (wt %) Jaguar C-14S1) (Rodhia) 0.4% Dehyton AB-302) (Cognis) 7% Texapon NSO IS3) (Cognis) 45.0% Dow Corning 2-16914) emulsion 3% Cutina AGS5) (Cognis) 0.9% Rewomid IPP 2406) (Degussa) 1.2% Cetyl alcohol 1.2% Glydant plus liquid7) (Lonza) 0.3% Water 41% 1) Guar gum, 2 hydroxy-3-(trimethylammonium)propyl ether chloride, origin: Rhodia, La Défense, France
2) Coco Betain, origin: Cognis, Monheim am Rhein, North Rhine-Westphalia, Germany
3) Sodium lauryl ether sulfate + 2EO,origin: Cognis, Monheim am Rhein, North Rhine-Westphalia, Germany
4) dimethyl(oxo)silane, origin: Dow Corning Corporation, Midland, USA
5) Ethylene glycol distearate origin: Cognis, Monheim am Rhein, North Rhine-Westphalia, Germany
6) Cocamide MIPA,origin: Degussa, Essen, Germany
7) DMDM hydantoin and iodopropynyl butylcarbamate, origin: Lonza - A hair swatch (500 mg) was wetted with 40 mL of tap water flowing at 36-40 °C. Excess water was removed by manually squeezing once. 0.2 mL of unperfumed shampoo was applied along the length of swatch and agitated by fingers. The swatch was rinsed with 100 mL running water and excess water was removed again by squeezing. Then 0.2 mL of shampoo containing 1.33% by weight of capsules A-M and I-XIII relative to the total weight of the shampoo (i.e. shampoo contained 0.4% perfume) was applied along the length of swatch and agitated by fingers. The swatch was then rinsed with 100 mL running water and excess water was shaken off. The treated part of the swatch was cut into a glass vial and dried at 60-75 °C. Three repetitions of swatches were treated for reproducibility. 5 ml of ethanol was added to the dry hair and the vial was shaken for 1 h to extract any deposit. The extract was filtered, concentrated and measured on an HPLC for UV absorption. The efficiency of the deposition of the capsules could be determined by comparing the UV absorption of the extract from treated hair swatch versus that directly from 0.2 mL shampoo containing capsules A-M and I-XIII. The results are shown in Table 9.
Table 9: Deposition efficiency of capsules A-P and control capsule I-XIV Sample Deposition Efficiency1) Capsule I 1.0% Capsule A 1.6% Capsule B 2.3% Capsule II 0.9% Capsule C 2.2% Capsule III 0.6% Capsule D 2.1% Capsule IV 3.6% Capsule E 5.6% Capsule V 0.8% Capsule F 1.8% Capsule G 1.30% Capsule VI 0.5% Capsule H 3.2% Capsule VII 1.9% Capsule I' 3.4% Capsule VIII 0.8% Capsule J 7.4% Capsule IX 1.2% Capsule K 2.0% Capsule X 1.6% Capsule L 2.3% Capsule XI 1.8% Capsule M 5.2% Capsule XII 2.0% Capsule N 4.1% Capsule XIII 0.3% Capsule O 1.9% Capsule XIII 1.5% Capsule P 2.2% 1) - The deposition of each capsules of the present invention can be compared to a control capsules without the polymeric cross-linker bearing amino group. Actually, the deposition efficiency of Capsules B (according to the invention) is -2 times higher than that of Control Capsules I. The deposition efficiency of Capsules C (according to the invention) is -2.4 times higher than that of Control Capsules II. The deposition efficiency of Capsules D (according to the invention) is -3.2 times higher than that of Control Capsules III. The deposition efficiency of Capsules E (according to the invention) is -1.5 times higher than that of Control Capsules IV.
- The deposition efficiency of Capsules F (not according to the invention) is -2.3 times higher than that of Control Capsules V.
- The deposition efficiency of Capsules H (according to the invention) is -6 times higher than that of Control Capsules VI. The deposition efficiency of Capsules I' (according to the invention) is -1.7 times higher than that of Control Capsules VII. The deposition efficiency of Capsules J (according to the invention) is -9.4 times higher than that of Control Capsules VIII. The deposition efficiency of Capsules K (according to the invention) is -1.7 times higher than that of Control Capsules IX. The deposition efficiency of Capsules L (according to the invention) is -1.4 times higher than that of Capsules X. The deposition efficiency of Capsules M (not according to the invention) is -2.9 times higher than that of Capsules XI. The deposition efficiency of Capsules N (not according to the invention) is -2.0 times higher than that of Capsules XII. The deposition efficiency of Capsules O (not according to the invention) is -6.8 times higher than that of Capsules XIII. The deposition efficiency of Capsules P (not according to the invention) is -1.4 times higher than that of Capsules XIV.
Claims (15)
- A process for the preparation of core-shell microcapsules comprising the following steps:a) dissolving at least one polyisocyanate having at least two isocyanate groups, in an oil phase preferably comprising a perfume;b) dispersing the oil phase obtained in step a) into an aqueous solution comprising as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms to form an oil-in-water emulsion:c) adding to the oil-in-water emulsion obtained in step b) a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol, followed by a polyamine with a molecular weight lower than 250 g/mol to form a microcapsule slurry,
characterized in that biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof. - The process according to claim 1, characterized in that the polymeric cross-linker bearing amino groups has a molecular weight higher than 50 000 g/mol, preferably higher than 200 000 g/mol.
- The process according to any one of claims 1 or 2 characterized in that the polymeric cross-linker bearing amino groups is chosen from the group consisting of a polyvinylamine, a polyethyleneimine, a polyaminoethylacrylate and mixtures thereof.
- The process according to any one of claims 1 to 3, characterized in that the polymeric cross-linker bearing amino groups and the emulsifier are used in a weight ratio based on dry matter comprised between 0.1 and 10, preferably between 0.5 and 2.
- The process according to any one of claims 1 to 4, characterized in that the at least one polyisocyanate is selected from the group consisting of a polyisocyanurate of toluene diisocyanate, a trimethylol propane-adduct of toluene diisocyanate, a trimethylol propane-adduct of xylylene diisocyanate, a trimer of hexamethylene diisocyanate, a trimer of isophorone diisocyanate, a trimethylol propane-adduct of hexamethylene diisocyanate, a biuret of hexamethylene diisocyanate and mixtures thereof.
- The process according to any one of claims 1 to 5, characterized in that the emulsifier is mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide.
- The process according to any one of claims 1 to 5, characterized in that the emulsifier is a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms.
- The process according to any one of claims 1 to 5, characterized in that the emulsifier is a biomacromolecule produced by living organisms.
- The process according to any one of claims 1 to 8, characterized in that the polyamine with a molecular weight lower than 250 g/mol is selected from the group consisting of 1,2-diaminopropane, 1,2-diaminoethane, diethylenetriamine, guanidine, water soluble guanidine salts, tris-(2-aminoethy)amine, N,N,N';N'-tetrakis(3-aminopropyl)-1,4-butanediamine, N,N'-bis(3-aminopropyl)-ethylenediamine and 3,5-diamino-1,2,4-triazole.
- The process according to any one of claims 1 to 9, characterized in that the concentration of perfume is comprised between 10% and 60% by weight relative to the total weight of the microcapsule slurry.
- Microcapsules comprising:- a polyurea wall, which comprises the reaction product of the polymerization between at least one polyisocyanate having at least two isocyanate groups and a polyamine with a molecular weight below 250 g/mol in the presence of a polymeric cross-linker bearing amino groups with a molecular weight equal or higher than 2 000 g/mol;- as an emulsifier i) a mixture of a neutral polyvinyl alcohol and a cationic polymer selected from the group consisting of quaternized copolymer of vinylpyrrolidone and dimethylaminoethyl methacrylate, polydiallyldimethyl ammonium chloride, copolymer of allyl dimethyl ammonium chloride/ acrylamide and copolymer of acrylamidopropyltrimonium chloride and acrylamide; ii) a mixture of a neutral polyvinyl alcohol and a biomacromolecule produced by living organisms; iii) a biomacromolecule produced by living organisms; wherein biomacromolecule produced by living organisms is chosen from the group consisting of gum Arabic, soy protein, gelatin, sodium caseinate, modified starch and mixtures thereof, and- a core comprising perfume, said microcapsules being at least partly aggregated.
- A perfuming composition comprisinga) at least partly aggregated perfume microcapsules according to claim 11;b) at least one ingredient selected from the group consisting of a perfumery carrier, a perfuming co-ingredient and mixtures thereof;c) optionally at least one perfumery adjuvant.
- A perfuming consumer product comprising as perfuming ingredient, microcapsules according to claim 11 or a perfuming composition according to claim 12.
- A perfuming consumer product according to claim 13, in the form of a fine perfume, a cologne, an after-shave lotion, a liquid or solid detergent, a fabric softener, a fabric refresher, an ironing water, a paper, a bleach, a shampoo, a hair conditioner, a coloring preparation, a hair spray, a vanishing cream, a deodorant or antiperspirant, a perfumed soap, a shower or bath mousse, an oil or gel, a hygiene product, an air freshener, a "ready to use" powdered air freshener, a wipe, a dish detergent, a hard-surface detergent, an animal litter, a diaper, a sanitary napkin, a liner or a wipe.
- Use of microcapsules as defined in claim 11, to extend fragrance release from a surface preferably skin, hair or fiber.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2015097447 | 2015-12-15 | ||
EP16150764 | 2016-01-11 | ||
PCT/EP2016/080931 WO2017102812A1 (en) | 2015-12-15 | 2016-12-14 | Process for preparing polyurea microcapsules with improved deposition |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3389845A1 EP3389845A1 (en) | 2018-10-24 |
EP3389845B1 true EP3389845B1 (en) | 2021-04-21 |
Family
ID=57517913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16808727.8A Active EP3389845B1 (en) | 2015-12-15 | 2016-12-14 | Process for preparing polyurea microcapsules with improved deposition |
Country Status (8)
Country | Link |
---|---|
US (1) | US11173465B2 (en) |
EP (1) | EP3389845B1 (en) |
JP (1) | JP6890592B2 (en) |
CN (1) | CN108367264B (en) |
BR (1) | BR112018012118A2 (en) |
MX (1) | MX2018007150A (en) |
SG (1) | SG11201803900UA (en) |
WO (1) | WO2017102812A1 (en) |
Families Citing this family (37)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9974720B2 (en) | 2015-12-30 | 2018-05-22 | International Flavors & Fragrances Inc. | Compositions containing microcapsules coated with deposition proteins |
WO2019054797A1 (en) * | 2017-09-15 | 2019-03-21 | 주식회사 엘지화학 | Polymeric composition, polymer capsule, and fabric softener composition including same |
EP3706897A1 (en) * | 2018-03-19 | 2020-09-16 | Firmenich SA | Process for the preparation of microcapsules |
SG10201806031VA (en) * | 2018-07-13 | 2020-02-27 | Mitsui Chemicals Inc | Re-dispersible polyurea microcapsules and method of preparing re-dispersible polyurea microcapsules |
ES2962863T3 (en) | 2018-12-19 | 2024-03-21 | Firmenich & Cie | Formulations and uses of sweeteners |
US20220017563A1 (en) | 2019-04-04 | 2022-01-20 | Firmenich Sa | Mogroside compounds and uses thereof |
FR3098113B1 (en) * | 2019-07-04 | 2022-05-27 | Capsum | Composition in the form of an oil-in-water emulsion with a fatty phase in the form of drops and aggregates |
WO2021094268A1 (en) | 2019-11-11 | 2021-05-20 | Firmenich Sa | Gingerol compounds and their use as flavor modifiers |
WO2021118864A1 (en) | 2019-12-13 | 2021-06-17 | Firmenich Incorporated | Taste modifying compositions and uses thereof |
CN114727633A (en) | 2019-12-13 | 2022-07-08 | 弗门尼舍公司 | Taste-improving composition and use thereof |
EP4044827A1 (en) | 2019-12-18 | 2022-08-24 | Firmenich Incorporated | Taste modifying compositions and uses thereof |
US20230000122A1 (en) | 2019-12-18 | 2023-01-05 | Firmenich Incorporated | Taste modifying compositions and uses thereof |
CN110961057A (en) * | 2020-01-16 | 2020-04-07 | 江苏罗格斯生物科技有限公司 | Green biological hydrogel conveying system and preparation method thereof |
US20230061835A1 (en) | 2020-03-05 | 2023-03-02 | Firmenich Sa | 11-oxo cucurbitanes and their use as flavor modifiers |
CN114096515A (en) | 2020-04-17 | 2022-02-25 | 弗门尼舍有限公司 | Amino acid derivatives and their use as flavor modifiers |
CN116322366A (en) | 2020-07-24 | 2023-06-23 | 弗门尼舍公司 | Deliciousness enhancement by transmembrane domain binding |
CN111764175A (en) * | 2020-07-30 | 2020-10-13 | 上海常嘉纺织科技有限公司 | Preparation method of microcapsule for treating fragrance of textile |
US20230329299A1 (en) | 2020-10-13 | 2023-10-19 | Firmenich Sa | Malonyl steviol glycosides and their comestible use |
US20230345986A1 (en) | 2020-10-27 | 2023-11-02 | Firmenich Sa | Conjugated diynes and their use as flavor modifiers |
WO2022155669A1 (en) | 2021-01-15 | 2022-07-21 | Firmenich Incorporated | Sweetener compositions comprising mogrosides and uses thereof |
EP4258897A1 (en) | 2021-01-15 | 2023-10-18 | Firmenich Incorporated | Sweetener compositions comprising mogrosides and uses thereof |
JP2024503100A (en) | 2021-01-15 | 2024-01-24 | フィルメニッヒ インコーポレイテッド | Sweetener compositions containing cyamenoside I and uses thereof |
WO2022207525A1 (en) * | 2021-03-31 | 2022-10-06 | Firmenich Sa | Coated core-shell microcapsules |
EP4307921A1 (en) | 2021-04-26 | 2024-01-24 | Firmenich Incorporated | Amide compounds and their use as flavor modifiers |
WO2022231908A1 (en) | 2021-04-26 | 2022-11-03 | Firmenich Incorporated | Amide compounds and their use as flavor modifiers |
WO2022238249A2 (en) | 2021-05-11 | 2022-11-17 | Firmenich Sa | Process of making gingerol compounds and their use as flavor modifiers |
BR112023022013A2 (en) | 2021-06-02 | 2023-12-26 | Firmenich & Cie | DEACETYLATION PROCESS, COMPOSITIONS AND USES THEREOF |
CN117651498A (en) | 2021-06-29 | 2024-03-05 | 弗门尼舍有限公司 | Glycyrrhiza compounds and their use as flavor modifiers |
EP4333645A1 (en) | 2021-06-29 | 2024-03-13 | Firmenich Incorporated | Mogroside compounds and their comestible use |
WO2023091315A2 (en) | 2021-11-16 | 2023-05-25 | Firmenich Incorporated | Amide compounds and their use as flavor modifiers |
WO2023102033A1 (en) | 2021-12-03 | 2023-06-08 | International Flavors & Fragrances Inc. | Aqueous fabric conditioner compositions with high performance fragrances |
WO2023168069A1 (en) | 2022-03-04 | 2023-09-07 | International Flavors & Fragrances Inc. | Fragrance compositions for sleep improvement |
WO2023172542A1 (en) | 2022-03-07 | 2023-09-14 | International Flavors & Fragrances Inc. | Fragrance-containing granules |
WO2023172372A1 (en) | 2022-03-11 | 2023-09-14 | Firmenich Incorporated | Amide compounds and their use as flavor modifiers |
WO2023172394A1 (en) | 2022-03-11 | 2023-09-14 | Firmenich Incorporated | Flavanone compounds and their use as flavor modifiers |
WO2023180063A1 (en) | 2022-03-25 | 2023-09-28 | Firmenich Sa | Fatty acid amides and their use as flavor modifiers |
WO2024035547A1 (en) | 2022-08-09 | 2024-02-15 | International Flavors & Fragrances Inc. | Fragrance-containing granules |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10117671A1 (en) | 2001-04-09 | 2002-10-10 | Bayer Ag | Odor-modified leather, comprises a fragrance in microcapsules comprising reaction products of guanidine compounds and polyisocyanates |
US8806617B1 (en) * | 2002-10-14 | 2014-08-12 | Cimcor, Inc. | System and method for maintaining server data integrity |
BRPI0514050B1 (en) * | 2004-08-04 | 2018-01-23 | Ciba Specialty Chemicals Holding Inc. | FUNCTIONAL PARTICULATES, PROCESS FOR PREPARATION, PROCESS FOR PREPARATION OF MODIFIED COMPOUNDS OR SUBSTRATES WITH THESE PARTICULARS, AND PARTIALLY MODIFIED POLYESOCYANATES |
CN101056700A (en) * | 2004-11-05 | 2007-10-17 | 巴斯福股份公司 | Microcapsule dispersions |
CN101104596A (en) * | 2006-07-11 | 2008-01-16 | 北京化工大学 | Temperature response type self-closed fragrant slow release microcapsule and preparation method thereof |
CN100528327C (en) * | 2007-07-30 | 2009-08-19 | 华东理工大学 | Polyureas microcapsule and its preparation method |
BRPI0915228B1 (en) * | 2008-06-16 | 2018-07-10 | Firmenich Sa | PREPARATION PROCESS OF POLYUREA MICROCapsules |
BRPI0922486B1 (en) * | 2008-12-18 | 2017-03-14 | Firmenich & Cie | microcapsules and their uses |
US9687424B2 (en) * | 2009-09-18 | 2017-06-27 | International Flavors & Fragrances | Polyurea capsules prepared with aliphatic isocyanates and amines |
US11311467B2 (en) * | 2009-09-18 | 2022-04-26 | International Flavors & Fragrances Inc. | Polyurea capsules prepared with a polyisocyanate and cross-linking agent |
US20110269657A1 (en) * | 2010-04-28 | 2011-11-03 | Jiten Odhavji Dihora | Delivery particles |
US9271905B2 (en) * | 2010-06-11 | 2016-03-01 | Firmenich S.A. | Process for preparing polyurea microcapsules |
GB201010701D0 (en) * | 2010-06-25 | 2010-08-11 | Givaudan Sa | Process for producing microcapsules |
CN103370126B (en) | 2011-02-07 | 2016-03-16 | 弗门尼舍有限公司 | Polyurea microcapsule |
WO2013000587A1 (en) * | 2011-06-28 | 2013-01-03 | Firmenich Sa | Process for preparing polyurea microcapsules |
US9358189B2 (en) | 2011-11-10 | 2016-06-07 | Firmenich Sa | Stable formaldehyde-free microcapsules |
WO2013092375A1 (en) * | 2011-12-22 | 2013-06-27 | Firmenich Sa | Process for preparing polyurea microcapsules |
BR112016003137B1 (en) * | 2013-08-15 | 2020-10-27 | International Flavors & Fragrances Inc | polyurea capsule composition, method for preparing a polyurea capsule composition and, consumer product |
MX2016015787A (en) * | 2014-06-13 | 2017-04-25 | Firmenich & Cie | Process for preparing polyurea microcapsules with improved deposition. |
CN104789355B (en) * | 2015-04-15 | 2018-05-11 | 上海爱文斯顿新材料科技有限公司 | The polyurea shell essence microcapsule of a kind of surface with positive charge and preparation method thereof |
-
2016
- 2016-12-14 WO PCT/EP2016/080931 patent/WO2017102812A1/en active Application Filing
- 2016-12-14 EP EP16808727.8A patent/EP3389845B1/en active Active
- 2016-12-14 US US16/062,246 patent/US11173465B2/en active Active
- 2016-12-14 MX MX2018007150A patent/MX2018007150A/en unknown
- 2016-12-14 SG SG11201803900UA patent/SG11201803900UA/en unknown
- 2016-12-14 JP JP2018531087A patent/JP6890592B2/en active Active
- 2016-12-14 CN CN201680073321.1A patent/CN108367264B/en active Active
- 2016-12-14 BR BR112018012118A patent/BR112018012118A2/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
CN108367264B (en) | 2021-07-27 |
CN108367264A (en) | 2018-08-03 |
JP2019500210A (en) | 2019-01-10 |
JP6890592B2 (en) | 2021-06-18 |
US11173465B2 (en) | 2021-11-16 |
MX2018007150A (en) | 2018-08-15 |
WO2017102812A1 (en) | 2017-06-22 |
EP3389845A1 (en) | 2018-10-24 |
SG11201803900UA (en) | 2018-06-28 |
US20180369777A1 (en) | 2018-12-27 |
BR112018012118A2 (en) | 2018-12-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3389845B1 (en) | Process for preparing polyurea microcapsules with improved deposition | |
EP3154507B1 (en) | Process for preparing polyurea microcapsules with improved deposition | |
US10900002B2 (en) | Microcapsules with high deposition on surfaces | |
EP3316973B1 (en) | Delivery system with improved deposition | |
US9034384B2 (en) | Polyurea microcapsules | |
JP7315558B2 (en) | Microcapsule manufacturing method | |
JP2023518238A (en) | Microcapsules coated with polysuccinimide derivatives | |
JP2022542633A (en) | Composite microcapsule | |
EP3894064B1 (en) | Process for preparing microcapsules | |
US20210015722A1 (en) | Process for the preparation of microcapsules | |
WO2020127743A1 (en) | Polyamide microcapsules | |
JP7154761B2 (en) | Method for producing microcapsules without melamine formaldehyde | |
EP3894063B1 (en) | Poly(ester urea) microcapsules | |
US11759759B2 (en) | Process for preparing microcapsules with improved deposition |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20180716 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20200309 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FIRMENICH SA |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20210118 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602016056580 Country of ref document: DE Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1384051 Country of ref document: AT Kind code of ref document: T Effective date: 20210515 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: FP |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG9D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1384051 Country of ref document: AT Kind code of ref document: T Effective date: 20210421 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210721 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210722 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210821 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210823 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210721 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602016056580 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed |
Effective date: 20220124 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210821 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MM Effective date: 20220101 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20211231 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20220101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211214 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20211231 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20230101 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO Effective date: 20161214 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230518 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20210421 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20231026 Year of fee payment: 8 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20231122 Year of fee payment: 8 Ref country code: DE Payment date: 20231024 Year of fee payment: 8 |